0.2.1 - Release

Add protocol-aware plan and ask modes

Introduce mode-specific agent flows for plan, ask, debug, and refactor, plus a read-only codebase research tool and slash-command UI. This changes the prompt system to prefer agent_v2 and full protocol prompt files, disables mutating tools in research-only modes, and adds model load/unload handling to the Electron sidecar. It also improves codebase lookup formatting, strengthens tool parsing for research-related actions, and adds regression tests for prompt composition, mode gating, and agent event lifecycle.