colab fix (lancedb#151)

* assests and app name

* update README

* demo gifs

* talk with github codespaces

* talk with github codespaces

* gitignore

* linted

* added version

* link fix

* added local llm tag

* crag

* link fix

* lint

* llm tags

* non-clickable badge

* non-clickable badge

* fix

* tutorial llm tags

* added instructions and fix

* colab fix