Create iOS app project repository bootstrap

Problem

Before starting actual development of the iOS application, a baseline project structure is desired.

Goal

Setup the initial iOS application project structure for development.

A/Cs

• automated Xcode workspace generation
• automated dependency management
• support for code linting and formatting (swiftlint, swifformat)
• support for generating localization assets (swiftgen)
• configure unit tests and UI tests test targets
• baseline OSS assets, such as licenses, SPDX headers, SECURITY.md, CONTRIBUTING.md, etc
• include the AusweisAppSDK and AusweisAppSDK Wrapper
• include the Matrix Rust SDK (at least for now)
• use the project template
• documentation on how to setup your development environment