Workspace mode

Similar to `yarn workspace run `

- `scriptpal ws` will present a list of packages in the workspace which can be fuzzy searched.
- once the package is found a prompt will be shown with the available commands.
- `scriptpal ws` and `scriptpal workspace` aliases
- `scriptpal ws foo` skips package name search
- Should work via vanilla npm, yarn, etc.

Start at the CLI entry point for `scriptpal ws` and its `scriptpal workspace` alias, then inspect how package scripts are discovered for npm and yarn. Implement package fuzzy search, command selection, and the `scriptpal ws foo` shortcut while preserving support for vanilla npm and other package managers. Done means all listed command forms present the expected package and script prompts.

Written by the indexing model from the issue text.