Add commands to append to winget.packages.json

[jjcarrier]

Add commands to add new entries to winget.packages.json.

This may also include some form of initialization process that pulls from a checkpoint and asks the user to confirm adding each package and what tag(s) to apply to the entry.

In the simplest case, it would be nice to have a command such as:

Add-WinGetSoftware -Id <package_id> -Tag ,

This should also support tab-completion for existing packages and tags allowing the user to add tags to an existing package.

[jjcarrier]

This may also include some form of initialization process that pulls from a checkpoint and asks the user to confirm adding each package and what tag(s) to apply to the entry.

Merge-WinGetRestore supports this.

Add-WinGetSoftware -Id <package_id> -Tag 

This feature is still likely desired since it avoids the requirement that the checkpoint needs to list the package that a user wants to add. It also is more explicit in the maintenance process. Of course, a user can always manually edit the JSON file.