docs(git-provider): Add initial git command documentation

- create solution folder for docs

docs/GitRepositoryRegistration.md

@@ -0,0 +1,19 @@
+# Git Repo Registration
+
+- all commands support `-debug`
+
+## New-GitRepoRegistration
+
+`New-GitRepoRegistration [-Name string]`
+
+## Get-GitRepoRegistration
+
+`Get-GitRepoRegistration`
+
+## Show-GitRepoRegistration
+
+`Show-GitRepoRegistration -Name string [-NoStack|-NoSetLocation]`
+
+## Remove-GitRepoRegistration
+
+`Remove-GitRepoRegistration [-Name string]`