chore: Add support for github actions and release-please. (#87)

.github/actions/build-docs/action.yml

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+# Use a step like this to build documentation.
+name: Build Documentation
+description: 'Build Documentation.'
+
+runs:
+  using: composite
+  steps:
+    - name: Build Documentation
+      shell: bash
+      run: make doc

.github/actions/ci/action.yml

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+# This is a composite to allow sharing these steps into other workflows.
+# For instance it could be used by regular CI as well as the release process.
+
+name: CI Workflow
+description: "Shared CI workflow."
+inputs:
+  run_tests:
+    description: "If true, run unit tests, otherwise skip them."
+    required: false
+    default: "true"
+
+runs:
+  using: composite
+  steps:
+    - run: make compile
+      shell: bash
+    - uses: supercharge/redis-github-action@1.6.0
+    - run: make ci-tests
+      shell: bash
+    - uses: ./.github/actions/build-docs
+    - run: make dialyze
+      shell: bash
+    - run: make build-contract-tests
+      shell: bash
+    - run: make start-contract-test-service-bg
+      shell: bash
+    - run: make run-contract-tests
+      shell: bash

.github/actions/configure-rebar/action.yml

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+name: Configure Rebar3
+description: 'Configure publishing token for Rebar3'
+inputs:
+  aws_assume_role:
+    description: 'The ARN of an AWS IAM role to assume. Used to auth with AWS to upload results to S3.'
+    required: true
+
+runs:
+  using: composite
+  steps:
+    - uses: launchdarkly/gh-actions/actions/release-secrets@release-secrets-v1.0.0
+      name: 'Get the hex publishing token'
+      with:
+        aws_assume_role: ${{ inputs.aws_assume_role }}
+        ssm_parameter_pairs: '/production/common/releasing/hex/api_key = HEX_AUTH_TOKEN'
+    - name: Configure rebar3
+      shell: bash
+      run: ./.github/scripts/configure_rebar3.sh
+      env:
+        HEX_AUTH_TOKEN: ${{ env.HEX_AUTH_TOKEN }}

.github/actions/publish-docs/action.yml

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+name: Publish Documentation
+description: 'Publish the documentation to hex.pm and github pages.'
+
+runs:
+  using: composite
+  steps:
+    - uses: launchdarkly/gh-actions/actions/publish-pages
+      name: 'Publish to Github pages'
+      with:
+        docs_path: doc
+    - run: rebar3 hex docs
+      shell: bash

.github/actions/publish/action.yml

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+name: Publish Package
+description: 'Publish the package to Hex.pm'
+inputs:
+  dry_run:
+    description: 'Is this a dry run. If so no package will be published.'
+    required: true
+
+runs:
+  using: composite
+  steps:
+    - name: Publish Library
+      shell: bash
+      run: rebar3 hex publish
+      # Do not publish a dry run.
+      if: ${{ inputs.dry_run == 'false' }}

.github/scripts/configure_rebar3.sh

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+#!/bin/bash
+
+# Make the directory the configuration should be stored in.
+mkdir -p ~/.config/rebar3/
+
+# Create rebar config with hex plugin.
+  cat >~/.config/rebar3/rebar.config <<EOF
+{plugins, [{rebar3_hex, "6.11.9"}]}.
+EOF
+
+# Create a hex.config file to allow publishing.
+# Note: The indentation here translates to the output file,
+# and the EOF must be at the start of the line.
+cat >~/.config/rebar3/hex.config <<EOF
+%% coding: utf-8
+#{<<"hexpm">> =>
+  #{username => <<"launchdarkly">>,
+    api_key => <<"${HEX_AUTH_TOKEN}">>}}.
+EOF

.github/workflows/ci.yml

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+name: Build and Test
+
+on:
+  push:
+    branches: [main]
+    paths-ignore:
+      - '**.md' #Do not need to run CI for markdown changes.
+  pull_request:
+    branches: [main]
+    paths-ignore:
+      - '**.md'
+
+jobs:
+  build-test:
+    strategy:
+      matrix:
+        versions: 
+        - {os: 'ubuntu-20.04', otp: '21.x', rebar: '3.15.2'}
+        - {os: 'ubuntu-22.04', otp: '24.x', rebar: '3.18.0'}
+        - {os: 'ubuntu-22.04', otp: '25.x', rebar: '3.18.0'}
+
+    runs-on: ${{ matrix.versions.os }}
+    name: Build and Test - ${{ matrix.versions.otp }}
+
+    steps:
+      - uses: erlef/setup-beam@v1
+        with:
+          version-type: loose
+          otp-version: ${{ matrix.versions.otp }}
+          rebar3-version: ${{ matrix.versions.rebar }}
+      - uses: actions/checkout@v3
+        with:
+          fetch-depth: 0
+
+      - uses: ./.github/actions/ci

.github/workflows/lint-pr-title.yml

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+name: Lint PR title
+
+on:
+  pull_request_target:
+    types:
+      - opened
+      - edited
+      - synchronize
+
+jobs:
+  lint-pr-title:
+    uses: launchdarkly/gh-actions/.github/workflows/lint-pr-title.yml@main

.github/workflows/manual-publish-docs.yml

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+on:
+  workflow_dispatch:
+
+name: Publish Documentation
+jobs:
+  build-publish:
+    runs-on: ubuntu-22.04
+    # Needed to get tokens during publishing.
+    permissions:
+      id-token: write
+      contents: read
+    steps:
+      - uses: erlef/setup-beam@v1
+        with:
+          version-type: loose
+          otp-version: 25.x
+          rebar3-version: 3.18.0
+      - uses: actions/checkout@v3
+      - id: build
+        name: Build Documentation
+        uses: ./.github/actions/build-docs
+
+      - uses: ./.github/actions/configure-rebar
+        with:
+          aws_assume_role: ${{ vars.AWS_ROLE_ARN }}
+
+      - id: publish
+        name: Publish Documentation
+        uses: ./.github/actions/publish-docs

.github/workflows/manual-publish.yml

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+name: Manual Publish Package
+on:
+  workflow_dispatch:
+    inputs:
+      dry_run:
+        description: 'Is this a dry run. If so no package will be published.'
+        type: boolean
+        required: true
+
+jobs:
+  manual-build-publish:
+    runs-on: ubuntu-22.04
+    # Needed to get tokens during publishing.
+    permissions:
+      id-token: write
+      contents: read
+    steps:
+      - uses: erlef/setup-beam@v1
+        with:
+          version-type: loose
+          otp-version: 25.x
+          rebar3-version: 3.18.0
+      - uses: actions/checkout@v3
+      - id: build-and-test
+        # Build using the same steps from CI.
+        name: Build and Test
+        uses: ./.github/actions/ci
+
+      - uses: ./.github/actions/configure-rebar
+        with:
+          aws_assume_role: ${{ vars.AWS_ROLE_ARN }}
+        if: ${{ !inputs.dry_run }}
+
+      - id: publish
+        name: Publish Package
+        uses: ./.github/actions/publish
+        with:
+          dry_run: ${{ inputs.dry_run }}