David Gwilliam cd5034ce78 feat: Add oscilloscope with image data source integration ...

- demo_image_oscilloscope.py: Uses ImageDataSource pattern to generate oscilloscope images
- Pygame renders waveforms to RGB surfaces
- PIL converts to 8-bit grayscale with RGBA transparency
- ANSI rendering converts grayscale to character ramp
- Features LFO modulation chain

Usage:
  uv run python scripts/demo_image_oscilloscope.py --lfo --modulate

Pattern:
  Pygame surface → PIL Image (L mode) → ANSI characters

Related to #46

2026-03-19 04:16:16 -07:00

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