gcloud cli is optional

add default gemini-extension.json

support AKI Key in addition to ADC

Update README to allow users select models for design generation

Update doc to support ADC authentication for now, and update legal

Merge pull request #5 from gemini-cli-extensions/david/enhance

consolidate commands and update README.md

feat: add enhance command

remote

fix the gemini cli link

Merge pull request #4 from dalmaer/patch-1

Update Gemini CLI Extensions link in README

Use API Key instead

add login

update the url of tos