Move implementation to `src` dir #218

	name: Library ON Push & PR DO Code check
	on:
	pull_request:
	push:
	branches:
	- "main"

	jobs:
	code-check:
	runs-on: ubuntu-latest

	steps:
	- uses: actions/checkout@v3

	- name: Setup Flutter
	uses: subosito/flutter-action@v2
	with:
	channel: "stable"

	- name: Check Flutter SDK version
	run: flutter --version

	- name: Get dependencies
	run: flutter pub get

	- name: Dart Code Metrics
	uses: solid-software/dart-code-metrics-action@bb6c6b9b92f6adbd2b77fd83747a85f1f1be17ca
	with:
	github_token: ${{ secrets.GITHUB_TOKEN }}
	fatal_warnings: true
	fatal_style: true
	folders: "lib"

	- name: Check formatting
	run: dart format . --set-exit-if-changed

	- name: Run tests
	run: \|
	# run tests if `test` folder exists
	if [ -d test ]
	then
	flutter test -r expanded
	else
	echo "Tests not found."
	fi

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