Create CI for automating documentation page

[Isadora]

Currently, I manually run in my machine:

dotnet build Murder.sln
.\tools\dotnet2md.ps1 ..\src\Murder\bin\Debug\net7.0
tools\publish.ps1

So it outputs the md files at docs\src and the html files at docs\book. We should rather have a GitHub action (or a bot?) that automatically generates the html files.