Added github-actions publish workflow #1

	name: publish SmartEnum.GuardClauses to nuget
	on:
	workflow_dispatch:
	push:
	branches:
	- main # Your default release branch
	paths:
	- 'src/SmartEnum.GuardClauses/**'
	jobs:
	publish:
	name: list SmartEnum.GuardClauses on nuget.org
	runs-on: windows-latest
	steps:
	- uses: actions/checkout@v2

	# Required for a specific dotnet version that doesn't come with ubuntu-latest / windows-latest
	# Visit bit.ly/2synnZl to see the list of SDKs that are pre-installed with ubuntu-latest / windows-latest
	- name: Setup .NET Core
	uses: actions/setup-dotnet@v3
	with:
	dotnet-version: \|
	6.0.x
	7.0.x
	8.0.x

	# Publish
	- name: publish on version change
	uses: alirezanet/[email protected]
	with:
	PROJECT_FILE_PATH: src/SmartEnum.GuardClauses/SmartEnum.GuardClauses.csproj # Relative to repository root
	VERSION_FILE_PATH: Directory.Build.props # Filepath with version info, relative to repository root. Defaults to project file
	VERSION_REGEX: <Version>(.*)<\/Version> # Regex pattern to extract version info in a capturing group
	TAG_COMMIT: true # Flag to enable / disable git tagging
	TAG_FORMAT: SmartEnumGuardClauses-v* # Format of the git tag, [*] gets replaced with version
	NUGET_KEY: ${{secrets.NUGET_API_KEY}} # nuget.org API key

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