chore: seed repo with .gitignore, .env.example, README skeleton

Initial commit. Establishes:
- .gitignore: .env (secrets), .venv, __pycache__, runtime dirs
  (logs/, state/, queue/, dispatch/). Removes the duplicate .env
  entry and the .env.example exclusion that was preventing the
  example file from being tracked.
- .env.example: ANTHROPIC_API_KEY/MODEL placeholders, NTFY_TOPIC
  (auto-generated on first run), STATUS_PORT, HISTORY_CHAR_CAP.
- README: install + run quickstart.

The daemon implementation lands on a feature branch.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

.env.example

@@ -0,0 +1,16 @@
+# Anthropic API
+ANTHROPIC_API_KEY=sk-ant-...
+ANTHROPIC_MODEL=claude-opus-4-7
+
+# ntfy.sh notification topic — leave empty on first run; the daemon will
+# generate a random topic and write it back to this file. Subscribe to
+# https://ntfy.sh/<topic> on your phone/laptop to receive needs_jc and
+# error notifications.
+NTFY_TOPIC=
+
+# Status endpoint (Flask). Default 8765.
+STATUS_PORT=8765
+
+# Optional: override the conversation-history character cap before
+# summarization kicks in. Default 400000.
+HISTORY_CHAR_CAP=400000