Initial Koin setup across modules

[crocsandcoffee]

📑 What does this PR do?

• Renamed MastodonApiImpl to MastodonApiKtor and marked internal. Added Koin bean to provide the interface MastodonApi which encapsulates implementation.
• Marked AuthenticationRepositoryImpl as internal. Added Koin bean to provide the interface AuthenticationRepository which encapsulates implementation.
• Created network and repository koin modules
• Created new di module for shared DI as well as entry point for resolving all DI modules cross platform and cross project

✅ Checklist

• [ ] My pull request adheres to the code style of this project
• [ ] My code requires changes to the documentation
• [ ] I have updated the documentation as required
• [ ] All the tests have passed

🧪 How can this PR been tested?

🧾 Tasks Remaining: (List of tasks remaining to be implemented)

• What is remaining to be implemented in this PR? Mention a list of them

🖼️ Screenshots (if applicable):