🩹 [Patch]: Move documentation and link to Process-PSModule (#56)

Description

This pull request primarily cleans up and simplifies the documentation and metadata for the Publish-PSModule GitHub Action. The most significant changes involve removing detailed usage instructions and specifications from the README.md, and simplifying the action's metadata in action.yml.

Documentation cleanup and simplification:

• The README.md file has been heavily reduced, removing detailed descriptions, usage instructions, configuration options, and example workflows, leaving only a brief reference to the PSModule framework.

Metadata update:

• The action.yml file has been simplified by removing branding information and shortening the action's name.