Document keybind implementation architecture

[Copilot]

The codebase lacked documentation on keybind implementation locations and architecture. This adds comprehensive technical documentation.

Changes

• KEYBINDS.md: Documents the three-layer keybind architecture

  • Utility layer (src/util/keybind.ts): Parsing/matching logic for keybind strings
  • Context layer (src/cli/cmd/tui/context/keybind.tsx): Solid.js provider with leader key state management
  • Configuration layer (src/config/config.ts): Zod schema defining 40+ configurable keybinds

• Includes architecture diagram, usage patterns, all available keybinds with defaults, and guide for adding new keybinds

• README.md: Added reference link to documentation

Example usage pattern documented:

import { useKeybind } from "@tui/context/keybind"

const keybind = useKeybind()

// Match keyboard events
if (keybind.match("app_exit", event)) {
  // handle exit
}

// Display to user
const exitKey = keybind.print("app_exit") // "ctrl+c"

Original prompt

where are keybinds implemented?

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