Remove reference library module

[FikriMilano]

Fixes #64 #56

• Remove all artifacts of the reference-library from the client app

• Replaces the direct module call with actual dependency Use the remote reference-library after available on Maven Central #56

• Rework the readme of client-app

• Rename rootProject.name to ohs-player-reference-client-app

• Update the imports from dev.ohs.player.library.* to dev.ohs.player.reference.library.*

• All CI build checks pass e.g. Tests

• Appropriate changes to documentation are included in the PR

[FikriMilano]

Blocked:
Need the alpha01 release of https://github.com/ohs-foundation/ohs-player-reference-client-library

[FikriMilano]

@ellykits please add some pointers about the README.md

[ellykits]

On the documentation for the reference app, please add these content (unordered):

1. How to get started with this GitHub template
2. How to customize and personalize the code, like package
3. The OHS foundation libraries that are bandled with the reference app (changing application name, icon etc)
4. How to run the reference app for those who just want to see OHS in action
5. Developer setup for KMP multiplatform
6. How to use the OHS player reference library for users with existing implementation who cannot afford to tweak this template for their use case
7. Mention the supported platforms and how they can be deployed via Git CI

Please add any relevant info that I may have left out. You can order the items above in the README. You don't have to get into a lot of details.