feat/hack: Add Zed support

[Josh-AS]

Summary

Adds support for the Zed agent in the CLI and templates.

Because Zed does not support slash commands currently, a workaround was implemented to allow similar functionality.

Changes

• Zed agent support
  • Command rules are compiled into a single .rules file, which is the format Zed accepts.
  • Introduced prompting to define a <slash_command> template.
  • Template rules are parsed into blocks and placed into the .rules file for Zed.

Notes / Limitations

• Attempting to use /specify (or any slash command) literally in Zed is still blocked.
• Running the same commands without the leading / works in testing runs.
• This approach is a hacky workaround to mimic slash command functionality in Zed.

[Josh-AS]

Made draft as could do with some more CLI changes so if they select zed it onboards them correctly and doesn't tell them they can use /commands but instead tells them to run "specify A todo app"

Also create-release-packages.sh could be updated to bootstrap the .rules file with prompting for handling their execution and then generate_commands could be reverted back to normal, then .rules references wherever the release templates are stored.

Would be a lot cleaner this way, but bed time.