chore(folio): nest iosApp under app/ for KotlinConf parity

Match KotlinConf-app's filesystem layout where every entry point (android,
ios, web, shared, ui-components) lives under app/. iosApp is still an Xcode
project, not a Gradle module, so settings.gradle.kts is unchanged.

examples/folio/app/iosApp/iosApp/Info.plist

@@ -0,0 +1,36 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+    <key>CFBundleDevelopmentRegion</key>
+    <string>$(DEVELOPMENT_LANGUAGE)</string>
+    <key>CFBundleExecutable</key>
+    <string>$(EXECUTABLE_NAME)</string>
+    <key>CFBundleIdentifier</key>
+    <string>$(PRODUCT_BUNDLE_IDENTIFIER)</string>
+    <key>CFBundleInfoDictionaryVersion</key>
+    <string>6.0</string>
+    <key>CFBundleName</key>
+    <string>Folio</string>
+    <key>CFBundleDisplayName</key>
+    <string>Folio</string>
+    <key>CFBundlePackageType</key>
+    <string>APPL</string>
+    <key>CFBundleShortVersionString</key>
+    <string>1.0</string>
+    <key>CFBundleVersion</key>
+    <string>1</string>
+    <key>LSRequiresIPhoneOS</key>
+    <true/>
+    <key>UILaunchScreen</key>
+    <dict/>
+    <key>UIApplicationSupportsIndirectInputEvents</key>
+    <true/>
+    <key>CADisableMinimumFrameDurationOnPhone</key>
+    <true/>
+    <key>UISupportedInterfaceOrientations</key>
+    <array>
+        <string>UIInterfaceOrientationPortrait</string>
+    </array>
+</dict>
+</plist>

examples/folio/app/iosApp/iosApp/iOSApp.swift

@@ -0,0 +1,20 @@
+import SwiftUI
+import Shared
+
+@main
+struct iOSApp: App {
+    var body: some Scene {
+        WindowGroup {
+            ComposeView()
+                .ignoresSafeArea(.all)
+                .ignoresSafeArea(.keyboard)
+        }
+    }
+}
+
+struct ComposeView: UIViewControllerRepresentable {
+    func makeUIViewController(context: Context) -> UIViewController {
+        MainViewControllerKt.MainViewController()
+    }
+    func updateUIViewController(_ uiViewController: UIViewController, context: Context) {}
+}

examples/folio/app/iosApp/project.yml

@@ -0,0 +1,43 @@
+name: iosApp
+options:
+  bundleIdPrefix: app.folio
+  deploymentTarget:
+    iOS: "15.0"
+  xcodeVersion: "16.0"
+
+settings:
+  base:
+    ENABLE_USER_SCRIPT_SANDBOXING: NO
+    SWIFT_VERSION: "5.0"
+    ONLY_ACTIVE_ARCH: YES
+    EXCLUDED_ARCHS[sdk=iphonesimulator*]: x86_64
+
+targets:
+  iosApp:
+    type: application
+    platform: iOS
+    sources:
+      - iosApp
+    dependencies:
+      - framework: ../shared/build/bin/iosSimulatorArm64/debugFramework/Shared.framework
+        embed: false
+      - sdk: libsqlite3.tbd
+    settings:
+      base:
+        PRODUCT_BUNDLE_IDENTIFIER: app.folio
+        PRODUCT_NAME: iosApp
+        INFOPLIST_FILE: iosApp/Info.plist
+        FRAMEWORK_SEARCH_PATHS:
+          - $(SRCROOT)/../shared/build/bin/$(KOTLIN_FRAMEWORK_DIR)/debugFramework
+        OTHER_LDFLAGS:
+          - -ObjC
+        KOTLIN_FRAMEWORK_DIR: iosSimulatorArm64
+    preBuildScripts:
+      - name: Build Kotlin framework
+        script: |
+          cd "$SRCROOT/../.."
+          ANDROID_HOME="${ANDROID_HOME:-$HOME/Library/Android/sdk}" \
+            ./gradlew :app:shared:linkDebugFrameworkIosSimulatorArm64
+        outputFiles:
+          - $(SRCROOT)/../shared/build/bin/iosSimulatorArm64/debugFramework/Shared.framework/Shared
+        basedOnDependencyAnalysis: false