#43: Add DesignKit package

* Begin implementing DesignKit package.
* Use element-design-tokens repo.
* Rename Fonts to align with Colours.

.gitignore

@@ -9,6 +9,15 @@ xcuserdata/
 *.dSYM.zip
 *.dSYM
 
+## SwiftPM
+/.build
+/Packages
+xcuserdata/
+DerivedData/
+.swiftpm/config/registries.json
+.swiftpm/xcode/package.xcworkspace/contents.xcworkspacedata
+.netrc
+
 # fastlane
 #
 # It is recommended to not store the screenshots in the git repo.
@@ -26,4 +35,4 @@ Tools/Scripts/element-android
 
 ## macOS Files
 .DS_Store
-._*
+._*