refactor: replace recipes with commands

[abeatrix]

The main goal of this PR is to deprecate recipes and migrates the popular recipes into commands, a new alternative to recipes.

See Test Plan on how to enable it for testing.

Note: The Custom Commands feature is still in the exploring stage and has not been finalized. Use at your own risk.

This PR includes:

• 3 new default commands created with a JSON file:
  • Document Code
  • Explain Code
  • Generate Unit Tests
• Added e2e test for Custom Commands
• renamed the my-cody directory to custom-prompts
• rename custom recipes to custom commands
• refactored custom recipes files and removed unused methods to custom commands
• renamed and clean up methods for custom commands
• remove redundant debug output from LocalAppDetector
• new command menu in command palette, with item to start inline chat
• 
• command menu can be invoked from icon in doc context menu, or shortcut cmd + shift + v
• 
• new custom commands config menu for managing custom commands config files
• 
• added code lenses for Cody that trigger the new command menu in text files
• 
• New slash commands panel invokable from chat box:
• 
• Moved cody items up in context menu
• 
• New cleaner UI with Recipes tab removed
• 

Test plan

added e2e test for custom commands and updated current tests to work with new default commands

[toolmantim]

I didn't have a chance to run it locally, but reviewed as much of the UI copy as I could

[toolmantim]

I was going to suggest some cleanups to this based on the changes I had in #374, but it's all going to get rm'd and switched to a quickpick yeah?

[abeatrix]

@toolmantim i just pushed some updates so that you won't need to set the feature flag to get those to work. I've also finished with the clean up and updated the PR so it's good to test! Happy to sync up later if you want.

[toolmantim]

It took a lot of fighting, but I got it looking pretty good across all themes, including high contrast! I also added a proper focus outline to the input too.

command.picker.mov

A few outstanding things I couldn't fix @beatrix:

1. The items are still in reverse alphabetical order (Z-A) but should be A-Z
2. I feel like escape should clear the input, making it feel as fast as the standard quickpick. It's a bit odd for a textarea but I think it makes more sense.
3. The command chooser should disappear when the input loses focus (and reappear when it does, if the input has a slash command in it). A few times I've accidentally deleted code in the editor mis-understanding the focus/cursor.