Create iOS demo app for CowCodable

Author: ANSCoder

.editorconfig

@@ -0,0 +1,12 @@
+root = true
+
+[*]
+charset = utf-8
+end_of_line = lf
+indent_style = space
+indent_size = 4
+insert_final_newline = true
+trim_trailing_whitespace = true
+
+[*.md]
+trim_trailing_whitespace = false

.github/workflows/ci.yml

@@ -0,0 +1,36 @@
+name: CI
+
+on:
+  push:
+    branches:
+      - main
+      - master
+  pull_request:
+
+jobs:
+  sdk-and-demo-validation:
+    runs-on: macos-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Show toolchain versions
+        run: |
+          swift --version
+          xcodebuild -version
+
+      - name: Build Swift package
+        run: swift build
+
+      - name: Test Swift package
+        run: swift test
+
+      - name: Build Demo app for iOS Simulator
+        run: |
+          xcodebuild \
+            -project DemoApp/CowCodableDemoApp/CowCodableDemoApp.xcodeproj \
+            -scheme CowCodableDemoApp \
+            -destination 'generic/platform=iOS Simulator' \
+            CODE_SIGNING_ALLOWED=NO \
+            build

.swiftformat

@@ -0,0 +1,15 @@
+--indent 4
+--allman false
+--commas inline
+--linebreaks lf
+--trimwhitespace always
+--insertlines enabled
+--self remove
+--ifdef no-indent
+--wraparguments before-first
+--wrapcollections before-first
+--wrapparameters before-first
+--closingparen balanced
+--ranges no-space
+--stripunusedargs closure-only
+--disable redundantFileprivate

README.md

@@ -171,6 +171,21 @@ struct Profile: Codable {
 - No hidden mutation of invalid backend data
 - No magic auto-fixes outside documented conversion rules
 
+## Quality Gates
+
+The repository uses deterministic validation for both SDK and demo app:
+
+1. `swift build`
+2. `swift test`
+3. `xcodebuild -project DemoApp/CowCodableDemoApp/CowCodableDemoApp.xcodeproj -scheme CowCodableDemoApp -destination 'generic/platform=iOS Simulator' CODE_SIGNING_ALLOWED=NO build`
+
+These checks run in CI at `.github/workflows/ci.yml`.
+
+## Formatting
+
+- Root editor policy: `/Users/anandnimje/Documents/CowCodable/.editorconfig`
+- SwiftFormat policy: `/Users/anandnimje/Documents/CowCodable/.swiftformat`
+
 ## License
 
 CowCodable is released under the MIT License.