Gemini Custom Commands for Chrome

See: https://cloud.google.com/blog/topics/developers-practitioners/gemini-cli-custom-slash-commands

Naming

The top-level directory is called "cr" (short for Chrome) so that "/cr:" will show all available custom commands. It is not necessary for custom commands to be put into subdirectories, but use them if it helps.

What Belongs Here?

Any prompt that is not a one-off could be put here. One-off prompts that should be used as examples should go in //agents/prompts/eval.