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/Packages/Intelligents/Package.swift

@@ -14,28 +14,29 @@ let package = Package(
   ],
   dependencies: [
     .package(path: "../AffineGraphQL"),
+    .package(path: "../AffineResources"),
     .package(url: "https://github.com/apollographql/apollo-ios.git", from: "1.22.0"),
-    .package(url: "https://github.com/apple/swift-collections", from: "1.2.0"),
-    .package(url: "https://github.com/devxoul/Then", from: "3.0.0"),
+    .package(url: "https://github.com/apple/swift-collections.git", from: "1.2.0"),
     .package(url: "https://github.com/SnapKit/SnapKit.git", from: "5.7.1"),
     .package(url: "https://github.com/SwifterSwift/SwifterSwift.git", from: "6.0.0"),
-    .package(url: "https://github.com/Recouse/EventSource", from: "0.1.4"),
-    .package(url: "https://github.com/Lakr233/ListViewKit", from: "1.1.6"),
-    .package(url: "https://github.com/Lakr233/MarkdownView", from: "3.4.1"),
+    .package(url: "https://github.com/Recouse/EventSource.git", from: "0.1.4"),
+    .package(url: "https://github.com/Lakr233/ListViewKit.git", from: "1.1.6"),
+    .package(url: "https://github.com/Lakr233/MarkdownView.git", from: "3.4.2"),
   ],
   targets: [
     .target(name: "Intelligents", dependencies: [
       "AffineGraphQL",
+      "AffineResources",
       "SnapKit",
-      "Then",
       "SwifterSwift",
       .product(name: "Apollo", package: "apollo-ios"),
       .product(name: "OrderedCollections", package: "swift-collections"),
-
       "ListViewKit",
       "MarkdownView",
       "EventSource",
     ], resources: [
+      .process("Resources/main.metal"),
+      .process("Resources/Media.xcassets"),
       .process("Interface/View/InputBox/InputBox.xcassets"),
       .process("Interface/Controller/AttachmentManagementController/AttachmentIcon.xcassets"),
     ]),