clean up code and add comments

Author: anamnavi

src/code/ContainerRegistryServerAPICalls.cs

@@ -20,7 +20,6 @@
 using System.Text;
 using System.Security.Cryptography;
 using System.Text.Json;
-using Microsoft.PowerShell.Commands;
 
 namespace Microsoft.PowerShell.PSResourceGet
 {

src/code/PublishHelper.cs

@@ -434,7 +434,6 @@ internal void PushResource(string Repository, string modulePrefix, bool SkipDepe
                         }
                     }
 
-                    // TODO: do we not want to additionally publish to DesintationPath if NupkgPath is specified?
                 }
 
                 string repositoryUri = repository.Uri.AbsoluteUri;
@@ -445,13 +444,15 @@ internal void PushResource(string Repository, string modulePrefix, bool SkipDepe
 
                     if (_isNupkgPathSpecified)
                     {
+                        // copy the .nupkg to a temp path (outputNupkgDir field) as we don't want to tamper with the original, possibly signed, .nupkg file
                         string copiedNupkgFilePath = CopyNupkgFileToTempPath(nupkgFilePath: Path, errRecord: out ErrorRecord copyErrRecord);
                         if (copyErrRecord != null)
                         {
                             _cmdletPassedIn.WriteError(copyErrRecord);
                             return;
                         }
 
+                        // get package info (name, version, metadata hashtable) from the copied .nupkg package and then populate appropriate fields (_pkgName, _pkgVersion, parsedMetadata)
                         GetPackageInfoFromNupkg(nupkgFilePath: copiedNupkgFilePath, errRecord: out ErrorRecord pkgInfoErrRecord);
                         if (pkgInfoErrRecord != null)
                         {
@@ -463,7 +464,6 @@ internal void PushResource(string Repository, string modulePrefix, bool SkipDepe
                     if (!containerRegistryServer.PushNupkgContainerRegistry(outputNupkgDir, _pkgName, modulePrefix, _pkgVersion, resourceType, parsedMetadata, dependencies, _isNupkgPathSpecified, Path, out ErrorRecord pushNupkgContainerRegistryError))
                     {
                         _cmdletPassedIn.WriteError(pushNupkgContainerRegistryError);
-                        // exit out of processing
                         return;
                     }
                 }