IOS CI workflow (#508)

Add iOS CI/CD workflow:
Set up GitHub Actions workflow for the iOS app to verify CocoaPods compatibility and build configuration. Configures Xcode 15.4, Swift 5.0, and iOS 18.5 simulator, with dynamic build destination resolution via xcodebuild device list. Updates Podfile and iPhone deployment target for toolchain compatibility.

Author: harishthakur52

.github/workflows/cocoapod.yml

@@ -0,0 +1,37 @@
+# This workflow builds and tests the iOS app with CocoaPods and Xcode
+# For more information see: https://docs.github.com/actions/guides/building-and-testing-swift
+
+name: IOS CI with cocoapods
+
+on:
+  push:
+    branches: [ master ]
+    paths:
+    - 'ios/OpenBot/**'
+    - '.github/workflows/cocoapod.yml'
+  pull_request:
+    branches: [ master ]
+    paths:
+    - 'ios/OpenBot/**'
+    - '.github/workflows/cocoapod.yml'
+
+jobs:
+  build:
+    runs-on: macos-15
+
+    defaults:
+      run:
+        working-directory: ios/OpenBot
+
+    steps:
+      - name: Checkout Repository
+        uses: actions/checkout@v4
+
+      - name: Install CocoaPods
+        run: sudo gem install cocoapods
+
+      - name: Remove Podfile.lock (regenerate)
+        run: rm -f Podfile.lock
+
+      - name: Pod install
+        run: pod install