Add unit and instrumentation tests

[OneXeor]

Description

Currently only placeholder tests exist. Need comprehensive test coverage.

Unit Tests

• Attribute parsing for all components
• Animation math/logic validation
• Bounds checking for custom attributes
• Color parsing

Instrumentation Tests

• Touch event handling (ParticlesView)
• View rendering verification
• Configuration change handling
• Memory leak detection

Tools

• JUnit 5
• Robolectric for unit tests
• Espresso for UI tests
• LeakCanary for memory tests