Init ci/cd

[aloisdg]

Inspired by other org's project. Fasmi's ci/cd is good example.

Fix #8

[aloisdg]

We have an error to deal with in the pipeline:

Run dotnet tool restore
/tmp/iid21x1d.pdi/restore.csproj : error NU1101: Unable to find package extlauncher. No packages exist with this id in source(s): nuget.org

Package "extlauncher" failed to restore, due to Microsoft.DotNet.ToolPackage.ToolPackageException: The tool package could not be restored.
   at Microsoft.DotNet.Tools.Tool.Install.ProjectRestorer.Restore(FilePath project, PackageLocation packageLocation, String verbosity)
   at Microsoft.DotNet.ToolPackage.ToolPackageInstaller.InstallPackageToExternalManagedLocation(PackageLocation packageLocation, PackageId packageId, VersionRange versionRange, String targetFramework, String verbosity)
   at Microsoft.DotNet.Tools.Tool.Restore.ToolRestoreCommand.InstallPackages(ToolManifestPackage package, Nullable`1 configFile)

I found this btw: cake-build/cake#3304 then actions/setup-dotnet#155

Edit: Dealt with.

[aloisdg]

Next step would be to tag to trigger a release