Update build to use .NET SDK 8 and C# 12 #74

	name: CI Build
	on:
	push:
	branches:
	- main
	- 'rel/**'
	workflow_dispatch:

	jobs:
	build:
	name: "Build"
	runs-on: windows-2022
	env:
	DOTNET_NOLOGO: true
	steps:
	- name: Clone source
	uses: actions/checkout@v3
	with:
	fetch-depth: 0
	submodules: true

	- name: Add MSBuild to PATH
	uses: microsoft/setup-msbuild@v1

	- name: Replace global.json
	run: cp .github/workflows/.global.json global.json
	shell: bash

	- name: Install .NET SDK
	uses: actions/setup-dotnet@v3
	with:
	dotnet-version: \|
	6.0.x
	8.0.x

	- name: Get .NET information
	run: dotnet --info

	- name: "Build target: BuildAll"
	run: dotnet run --project tools/builder --no-launch-profile -- BuildAll --timing

	- name: "Build target: PublishPackages"
	env:
	PUSH_APIKEY: ${{ secrets.PUSH_APIKEY }}
	PUSH_URI: ${{ secrets.PUSH_URI }}
	SIGN_APP_ID: ${{ secrets.SIGN_APP_ID }}
	SIGN_APP_SECRET: ${{ secrets.SIGN_APP_SECRET }}
	SIGN_CERT_NAME: ${{ secrets.SIGN_CERT_NAME }}
	SIGN_SUBSCRIPTION: ${{ secrets.SIGN_SUBSCRIPTION }}
	SIGN_TENANT: ${{ secrets.SIGN_TENANT }}
	SIGN_TIMESTAMP_URI: ${{ secrets.SIGN_TIMESTAMP_URI }}
	SIGN_VAULT_URI: ${{ secrets.SIGN_VAULT_URI }}
	run: dotnet run --project tools/builder --no-launch-profile -- PublishPackages --timing

	- name: "Upload artifact: test"
	uses: actions/upload-artifact@v3
	with:
	name: test
	path: artifacts/test
	if: always()

	- name: "Upload artifact: packages"
	uses: actions/upload-artifact@v3
	with:
	name: packages
	path: artifacts/packages
	if: always()

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