Error fixes specifically to do with .yml

Error: "root manifest not found"

Refer to: https://github.com/JASS-2021/smart-infrastructure/pull/4/checks?check_run_id=2242389146

Error message:

Run swift test --configuration debug --enable-test-discovery error: root manifest not found Error: Process completed with exit code 1.

## Solution: (from https://medium.com/@edabdallamo/fixing-github-actions-swift-error-root-manifests-6337c8d1506e) Run the following in your local repo: swift package init ## "a manifest file exists already" -- then what exactly IS the problem?? swift package generate-xcodeproj ## started a long fetching thing on my terminal

Add the following job to .yml: initialise_swift_pkg_manager: name: initialise_swift_pkg_manager because GitHubActions stupid

`runs-on: macos-latest`

`steps:`
  `- uses: actions/checkout@v2`
  `- name: Initialise package`
    `run: swift package init && swift package generate-xcodeproj`
  `- name: Force Xcode 11`
    `run: sudo xcode-select -switch /Applications/Xcode_11.5.app`
  `- name: Build`
    `run: swift build -v`
  `- name: Run tests`
    `run: swift test -v`

and then add that job into the needs array of Build & Test job.