Moved android and desktop code to shared module

[VictorKabata]

Description

• Moved appDesktop UI code to shared>desktopMain src set
• Moved appAndroid UI code to shared>androidMain src set

Issue

N/A

Changes Made

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Screenshots / GIFs

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Checklist

• [x] I have tested the changes on both Android, iOS and Desktop platforms.
• [ ] I have written unit tests for the new code (if applicable).
• [ ] I have updated the project's documentation (if necessary).
• [x] I have checked for any potential code duplications and removed them.
• [x] I have run the Kotlin/Compose Multiplatform Gradle tasks and verified that they were completed successfully.
• [x] I have considered the impact of these changes on the existing codebase.

Additional Notes

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