feat: initial implementation

Asyncio IRC bot with decorator-based plugin system.
Zero external dependencies, Python 3.11+.

- IRC protocol: message parsing, formatting, async TCP/TLS connection
- Plugin system: @command and @event decorators, file-based loading
- Bot orchestrator: connect, dispatch, reconnect, nick recovery
- CLI: argparse entry point with TOML config
- Built-in plugins: ping, help, version, echo
- 28 unit tests for parser and plugin system

ROADMAP.md

@@ -0,0 +1,33 @@
+# derp - Roadmap
+
+## v0.1.0 (current)
+
+- [x] IRC protocol: connect, parse, send
+- [x] TLS support
+- [x] Plugin system with `@command` and `@event`
+- [x] TOML configuration
+- [x] Built-in plugins: ping, help, version
+- [x] Auto PING/PONG, nick recovery, reconnect
+- [x] CLI entry point
+
+## v0.2.0
+
+- [ ] Plugin hot-reload (`!reload` command)
+- [ ] Per-channel plugin enable/disable
+- [ ] SASL authentication
+- [ ] Rate limiting (anti-flood)
+- [ ] CTCP VERSION/TIME/PING responses
+
+## v0.3.0
+
+- [ ] Admin system (owner/admin nicks in config)
+- [ ] Permissions per command
+- [ ] Channel management commands (kick, ban, topic)
+- [ ] Plugin state persistence (sqlite)
+
+## v1.0.0
+
+- [ ] Multi-server support
+- [ ] IRCv3 capability negotiation
+- [ ] Message tags support
+- [ ] Stable plugin API