refactor(switch): align interaction model with MD3 guidelines

[ruben-rebelo]

Refactor Switch to improve Material Design 3 compliance, remove problematic children patterns, improve performance characteristics, and modernize the public API.

Problems

• Current API relies heavily on children composition in ways that are difficult to optimize
• Internal layout logic is tightly coupled to arbitrary child structures
• MD3 behaviors and visuals are not fully aligned with current Material guidelines
• Rendering performance can degrade in large lists or frequently updated screens
• Type safety and discoverability of the API can be improved
• The component has inconsistent behavior between platforms and edge cases

Focus Areas

• Improve thumb and track animations
• Improve state layer behavior
• Improve disabled and pressed states
• Standardize sizing and spacing

Performance Opportunities

• Reduce animation allocations
• Improve controlled state rendering