docs: refresh README + docs/ for v0.2.0

The README still framed the project as "Phase 5 / pre-v0.1.0" and the
docs predated the v0.2.0 surface (typed BridgeOp, public service
interfaces, port negotiation, pre-migration auto-backup, bridge:export,
periodic auto-update, two new makers, qmltestrunner). Bring them in line
with what's actually shipped, and add badges (release, license, PHP,
Symfony, Qt, FrankenPHP, CI, platform) to the README so the status is
legible at a glance.

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

docs/getting-started.md

@@ -233,7 +233,7 @@ curl -i http://127.0.0.1:8765/healthz
 
 - `Connection refused` — FrankenPHP didn't start. Check `tail -f symfony/var/log/dev.log` and the terminal `make dev` is running in.
 - `401` on `/api/*` — the host is sending the wrong bearer. In dev that's `BRIDGE_TOKEN` from `.env`; the Qt host reads it via `BackendConnection.token` which defaults to `qgetenv("BRIDGE_TOKEN")`.
-- Port 8765 already taken — another `make dev` is still running. `pkill -f frankenphp` and retry.
+- Port 8765 already taken — another `make dev` is still running. `pkill -f frankenphp` and retry. (Bundled-mode AppImages don't share this failure mode — they negotiate a free ephemeral port at launch; see [Bundled mode §port negotiation](bundled-mode.md#port-negotiation).)
 
 ### `composer install` fails with "your php version (8.3.x) does not satisfy"