chore: fix building the app (#13606)

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit

- New Features
  - Built-in Then-style DSL for fluent configuration.
- Centralized theming via a new resources library exposing standardized
colors and icons for SwiftUI and UIKit.

- Refactor
  - Migrated color and icon accessors to the new resources provider.
  - Removed redundant imports and streamlined UI configuration.

- Dependencies
  - Updated MarkdownView to 3.4.2.
- Removed the Then third-party dependency; updated package sources;
added resources package and assets.

- Documentation
  - Added iOS Swift code style and architecture guidelines.

- Chores
  - Updated Xcode project format and repository ignore rules.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

packages/frontend/apps/ios/App/Podfile.lock

@@ -45,13 +45,13 @@ EXTERNAL SOURCES:
     :path: "../../../../../node_modules/capacitor-plugin-app-tracking-transparency"
 
 SPEC CHECKSUMS:
-  Capacitor: 106e7a4205f4618d582b886a975657c61179138d
-  CapacitorApp: d63334c052278caf5d81585d80b21905c6f93f39
-  CapacitorBrowser: 081852cf532acf77b9d2953f3a88fe5b9711fb06
+  Capacitor: 03bc7cbdde6a629a8b910a9d7d78c3cc7ed09ea7
+  CapacitorApp: febecbb9582cb353aed037e18ec765141f880fe9
+  CapacitorBrowser: 6299776d496e968505464884d565992faa20444a
   CapacitorCordova: 5967b9ba03915ef1d585469d6e31f31dc49be96f
-  CapacitorHaptics: 70e47470fa1a6bd6338cd102552e3846b7f9a1b3
-  CapacitorKeyboard: 969647d0ca2e5c737d7300088e2517aa832434e2
-  CapacitorPluginAppTrackingTransparency: 2a2792623a5a72795f2e8f9ab3f1147573732fd8
+  CapacitorHaptics: 1f1e17041f435d8ead9ff2a34edd592c6aa6a8d6
+  CapacitorKeyboard: 09fd91dcde4f8a37313e7f11bde553ad1ed52036
+  CapacitorPluginAppTrackingTransparency: 92ae9c1cfb5cf477753db9269689332a686f675a
   CryptoSwift: 967f37cea5a3294d9cce358f78861652155be483
 
 PODFILE CHECKSUM: 2c1e4be82121f2d9724ecf7e31dd14e165aeb082