Added info on the protobuf usage and overview diagram #6

	name: Build and Test

	on:
	push:
	branches: [ main ]
	pull_request:
	branches: [ main ]

	jobs:
	build-and-test:
	runs-on: ubuntu-latest

	steps:
	- uses: actions/checkout@v2
	with:
	submodules: true

	- name: Setup .NET
	uses: actions/setup-dotnet@v1
	with:
	dotnet-version: 7.0.x

	- name: Restore dependencies
	run: dotnet restore

	- name: Build
	run: dotnet build --configuration Release

	- name: Test
	run: dotnet test --configuration Release --no-build

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