Replace the ripgrep_launcher.cjs intermediary with direct binary execution.
This simplifies the ripgrep module by spawning the binary directly instead
of going through a Node.js subprocess wrapper. Add platform-specific binary
path resolution to handle both Unix and Windows environments.
Enables building hapi as standalone Bun-compiled executables for macOS,
Linux, and Windows (x64/arm64). Adds build script, bootstrap entry point,
runtime asset management, and automatic deployment of bundled tools
(ripgrep, difftastic). Includes MCP stdio bridge support and proper
environment handling for compiled binaries. Updates documentation with
build and installation instructions for single executable distribution.
Introduce runtime path abstraction for Bun-compiled binaries that extracts
assets to ~/.happy/runtime/{version} instead of using project paths. This
enables proper distribution of CLI as a self-contained binary with embedded
tools (ripgrep, difftastic) and scripts that are extracted at runtime.
Replace hardcoded 'node' commands with process.execPath to support
Bun runtime alongside Node.js. Add runtime detection and entrypoint
resolution for Bun. Update documentation to reflect multi-runtime support.
