Code-generate the Xcode project files for a leaner repository (#3)

- Reimplement HippoAnalytics and HippoPayments as Swift packages to easily share them across examples since they are never edited in the book
- Convert each chapter beginning and end source to be code generated via xcodegen, https://github.com/yonaskolb/XcodeGen
- Remove the unused UI tests target
- Also remove the build script sorting the project alphabetically, now unnecessary thanks to xcodegen's code generating the project and sorting the files every time

Author: mokagio

04-tdd-in-the-real-world/0-start/.gitignore

@@ -29,3 +29,4 @@ DerivedData
 #
 # Pods/
 
+*.xcodeproj

04-tdd-in-the-real-world/0-start/Albertos.xcodeproj/project.pbxproj

@@ -0,0 +1,19 @@
+include:
+  - ../../constants.yml
+targets:
+  Albertos:
+    type: application
+    platform: iOS
+    sources: [Albertos]
+    scheme:
+      testTargets: [AlbertosTests]
+  AlbertosTests:
+    target: Albertos
+    type: bundle.unit-test
+    platform: iOS
+    sources: [AlbertosTests]
+    settings:
+      # No need for code signing in this demo, plus, it's the test target
+      CODE_SIGNING_ALLOWED: NO
+    dependencies:
+      - target: Albertos

04-tdd-in-the-real-world/0-start/Albertos.xcodeproj/xcshareddata/xcschemes/Albertos.xcscheme

@@ -29,3 +29,4 @@ DerivedData
 #
 # Pods/
 
+*.xcodeproj