Initial implementation of IRC LLM bot

Full implementation from spec: ZNC/IRC client with TLS, Ollama LLM backend,
per-user SQLite conversation memory, and Flask web admin portal with 7 pages.

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

.gitignore

@@ -0,0 +1,12 @@
+.env
+__pycache__/
+*.py[cod]
+*.pyo
+venv/
+.venv/
+data/history/
+data/ircbot.pid
+data/ircbot.sock
+logs/
+*.db
+*.log