Add metrics/logging for Gemini CLI extensions commands

[chrstnb]

We currently have clearcut logging for usage of install. We should also be logging uninstall, enable, disable, update, and ensure extension tool calls are logged properly.

[gemini-cli]

Found possible duplicate issues:

• [Extensions] Add logging for extension operations #8085

If you believe this is not a duplicate, please remove the status/possible-duplicate label.