[Feature Request] LLM Docs: Add documentation for the keyboard shortcut

[lsmith77]

Is your feature request related to a problem? Please describe. Every time I want to generate the LLM docs I am left wondering what the keyboard shortcut is, ie. Cmd+Shift+V

Describe the solution you'd like Add this information to the VSCode Ext Overview page: https://marketplace.visualstudio.com/items?itemName=zenstack.zenstack

Describe alternatives you've considered Also add it to the generation documentation: https://zenstack.dev/docs/guides/ide#vscode

Additional context Add any other context or screenshots about the feature request here.