Add support for using npm package names (e.g., @scope/my-module) as aliases
for control file names (e.g., my-module) in deploy, revert, verify, and tag
commands.

Changes:
- Add package-alias.ts utility with buildPackageAliasMap() and resolvePackageAlias()
- Update deploy.ts, revert.ts, verify.ts, tag.ts to resolve package aliases
- Update module-utils.ts selectPackage() to accept aliased names
- Update deployed-changes.ts to accept aliased names with cwd parameter

This is a CLI-only change that keeps core logic unchanged. Users can now use:
  pgpm deploy --package @some-scope/my-module
instead of:
  pgpm deploy --package my-module

Co-Authored-By: Dan Lynch <pyramation@gmail.com>