Add Meter Palette Tests (Beginner and Advanced)

- Add comprehensive test coverage for Meter palette blocks
- Meter Palette Tests Beginner: meter, beat count, whole notes played, notes played, BPM
- Meter Palette Tests Advanced: current meter, beat factor, measure count, note counter, on strong beat, pickup
- Increase test suite coverage from 25% to include Meter palette
- Follow existing test patterns with proper compare test framework
- Add 62 new test blocks to test-suite.html

Fixes part of #5607

Author: 021nirav-blip