Move scan_from_root, scan_all_roots, get_projects, show_cache_status
and launch_tmux_session from main.rs into a new src/lib.rs, making
them pub so they are testable independently of the binary entrypoint.
main.rs is now a thin entrypoint that imports from tmuxido:: and keeps
only select_project_with_fzf (interactive subprocess, not unit-testable).
Add tempfile = "3" to [dev-dependencies] in preparation for tests.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Add CLAUDE.md with project-specific rules (test structure, naming
conventions, MCP tools reference). Add .mcp.json for rust-mcp and
crates-io MCP servers. Add rust-toolchain.toml pinning stable with
rustfmt and clippy. Add .claude/settings.json with PostToolUse hook
that runs cargo test automatically after every file edit.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
