feat: initial IRC bouncer implementation

Async Python IRC bouncer with SOCKS5 proxy support, multi-network
connections, password auth, and persistent SQLite backlog with replay.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

TODO.md

@@ -0,0 +1,29 @@
+# TODO
+
+## Features
+
+- [ ] Client TLS (accept encrypted client connections)
+- [ ] SASL PLAIN/EXTERNAL for IRC server auth
+- [ ] Channel key support
+- [ ] CTCP VERSION/PING responses
+- [ ] Hot config reload on SIGHUP
+- [ ] Web status dashboard
+- [ ] DCC passthrough
+
+## Infrastructure
+
+- [ ] Systemd unit file
+- [ ] Containerfile for podman deployment
+- [ ] PyPI packaging
+
+## Testing
+
+- [ ] Integration tests with mock IRC server
+- [ ] SOCKS5 proxy failure tests
+- [ ] Backlog replay edge cases
+- [ ] Concurrent client attach/detach
+
+## Documentation
+
+- [ ] Architecture diagram
+- [ ] Sequence diagrams for connection flow