feat: Add GitRepoRegistration cmdlets (#5)

- adds GitRepoRegistration cmdlets
- adds basic tests for GitRepoRegistration implementations
- adds initial build project and scripts

Refs: #5, #6

build/Scripts/CreateModuleManifest.ps1

@@ -1,15 +1,18 @@
-param (
-    [string]$path,
+param (
+    [string]$powershellModuleFileLocation,
     [string]$guid,
     [string]$author,
     [string[]]$nestedModules,
     [string]$rootModule,
     [string[]]$cmdletsToExport,
-    [string]$manifestFileLocation
+    [string]$manifestFileLocation,
+    # not used for anything yet, but I should probably simplify the module locations as they get the output dir
+    # created in CopyOutputTask.cs
+    [string]$outputDir
 )
 
 $manifestSplat = @{
-    Path = "$path"
+    Path = "$powershellModuleFileLocation"
     GUID = "$guid"
     Author = "$author"
     NestedModules = @($nestedModules)
@@ -21,4 +24,4 @@ $manifestSplat = @{
 }
 
 New-ModuleManifest @manifestSplat
-New-Item "$manifestFileLocation" -ItemType File
+New-Item "$manifestFileLocation" -ItemType File -Value "# This file is run when Import-Module `"PowershellModule`" is called"