feat(tor): Tor-by-default scaffold and integration

- Add TorManager with static/dlopen start, torrc generation, SOCKS probe
- Add TorURLSession; route Nostr/Web fetches via SOCKS proxy
- Add chat system messages for Tor status; show progress (macOS) and ready
- Disable ControlPort bootstrap monitor on iOS; keep it on macOS
- Make Tor waits non-blocking; avoid main-actor stalls on startup
- Queue & flush Nostr subscriptions on relay connect; skip duplicates
- Always rewrite torrc at launch to fix iOS container path mismatches
- Link libz; add project wiring for tor-nolzma.xcframework
- Minor fixes: SOCKS probe resumeOnce guard, entitlement for network.server (macOS)

Frameworks/README.md

@@ -0,0 +1,12 @@
+Place Tor.xcframework here
+
+Instructions
+- Obtain a prebuilt Tor Apple xcframework (iCepa/Onion Browser lineage) or build your own minimal client-only Tor.
+- Rename it (if needed) to `Tor.xcframework` and drop it in this `Frameworks/` directory.
+- Regenerate the Xcode project if you use XcodeGen (`project.yml` already references `Frameworks/Tor.xcframework`).
+- Build the app; `TorManager` will automatically bootstrap Tor and route all networking through it.
+
+Notes
+- For iOS, the framework will be embedded and code-signed automatically.
+- For macOS, it will be linked and embedded as well (you may prefer a system tor for smaller bundles).
+