feat(ci): create ci workflow

.github/workflows/ci.yml

@@ -0,0 +1,55 @@
+name: CI
+
+on:
+  push:
+    branches: [ main ]
+    paths:
+      - "**.go"
+      - go.mod
+      - go.sum
+  pull_request:
+    branches: [ main ]
+    paths:
+      - "**.go"
+      - go.mod
+      - go.sum
+
+jobs:
+  build:
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest, windows-latest, macos-latest]
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Set up Go
+        uses: actions/setup-go@v5
+        with:
+          go-version-file: 'go.mod'
+
+      - name: Build
+        run: go build -v ./cmd/gh-not
+
+      - name: Test
+        run: go test -v ./...
+
+      # Taken from https://github.com/cli/cli/blob/trunk/.github/workflows/lint.yml
+      - name: Lint
+          run: |
+            STATUS=0
+            assert-nothing-changed() {
+              local diff
+              "$@" >/dev/null || return 1
+              if ! diff="$(git diff -U1 --color --exit-code)"; then
+                printf '\e[31mError: running `\e[1m%s\e[22m` results in modifications that you must check into version control:\e[0m\n%s\n\n' "$*" "$diff" >&2
+                git checkout -- .
+                STATUS=1
+              fi
+            }
+
+            assert-nothing-changed go fmt ./...
+            assert-nothing-changed go mod tidy
+
+            exit $STATUS