Add FreeBSD support (missing x64-freebsd ripgrep binary)

Problem

Claude Code fails on FreeBSD because the bundled ripgrep vendor directory doesn't include a FreeBSD binary:

spawn ~/.claude/local/node_modules/@anthropic-ai/claude-code/vendor/ripgrep/x64-freebsd/rg ENOENT

The vendor directory includes arm64-darwin, arm64-linux, x64-darwin, x64-linux, and x64-win32 — but not x64-freebsd.

Environment

• OS: FreeBSD 14.3-RELEASE (also tested on 15.0)
• Install method: npm (local install)
• System ripgrep: /usr/local/bin/rg (v14.1.1, installed via pkg)

Workaround

Symlinking system ripgrep works, but breaks on every Claude Code update:

mkdir -p ~/.claude/local/node_modules/@anthropic-ai/claude-code/vendor/ripgrep/x64-freebsd
ln -s /usr/local/bin/rg ~/.claude/local/node_modules/@anthropic-ai/claude-code/vendor/ripgrep/x64-freebsd/rg

Suggested Fix

Either:

1. Bundle an x64-freebsd ripgrep binary, or
2. Fall back to system rg (via which rg) when the platform-specific binary is missing

Option 2 would be more robust and support any Unix-like system with ripgrep installed.