chore: remove legacy TUI configurator; surface last config gap in GUI (#45)

Audit confirmed the Rich TUI (`meshai --config`) is a strict subset of the
dashboard GUI (covers FEWER sections) and nothing depends on it for bootstrap.
Strip it so the dashboard is the single config surface.

- delete meshai/cli/configurator.py (~1435 lines); cli/__init__ minimal
- main.py: drop --config + run_configurator dispatch (keep --config-file);
  bootstrap log now points to config.example.yaml / the dashboard
- docker-entrypoint.sh: remove the ttyd `meshai --config` block on :7682
  (default-config heredoc + bot exec loop untouched)
- docker-compose.yml + Dockerfile: drop the 7682 port + ttyd install (EXPOSE 8080)
- README / config.py header / config.example.yaml: de-reference the TUI
- drop `rich` from pyproject + requirements (grep-verified unused)

Close the only GUI config gap the audit found:
- Config.tsx weather tab: add openmeteo.url + wttr.url inputs (backend already
  round-trips the nested WeatherConfig dataclasses)

Bootstrap intact: config.example.yaml copy, entrypoint default-config write,
and defaulted Config() when no file exists all remain. `python3 -m meshai`
and `--config-file` unchanged. TS/import validated at Docker build.

Co-authored-by: Matt Johnson <mj@k7zvx.com>
Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

work/dashboard-frontend/src/pages/Config.tsx

@@ -1137,6 +1137,20 @@ function WeatherSection({ data, onChange }: { data: WeatherConfig; onChange: (d:
         placeholder="Your city, state"
         helper="Location when none specified"
       />
+      <TextInput
+        label="Open-Meteo base URL (advanced)"
+        value={data.openmeteo.url}
+        onChange={(v) => onChange({ ...data, openmeteo: { ...data.openmeteo, url: v } })}
+        placeholder="https://api.open-meteo.com/v1"
+        helper="Override the Open-Meteo API endpoint (leave default unless self-hosting)"
+      />
+      <TextInput
+        label="wttr.in base URL (advanced)"
+        value={data.wttr.url}
+        onChange={(v) => onChange({ ...data, wttr: { ...data.wttr, url: v } })}
+        placeholder="https://wttr.in"
+        helper="Override the wttr.in endpoint (leave default unless self-hosting)"
+      />
     </div>
   )
 }