David Gwilliam 33df254409 feat(positioning): Add configurable PositionStage for positioning modes ...

- Added PositioningMode enum (ABSOLUTE, RELATIVE, MIXED)
- Created PositionStage class with configurable positioning modes
- Updated terminal display to support positioning parameter
- Updated PipelineParams to include positioning field
- Updated DisplayStage to pass positioning to terminal display
- Added documentation in docs/positioning-analysis.md

Positioning modes:
- ABSOLUTE: Each line has cursor positioning codes (\033[row;1H)
- RELATIVE: Lines use newlines (no cursor codes, better for scrolling)
- MIXED: Base content uses newlines, effects use absolute positioning (default)

Usage:
  # In pipeline or preset:
  positioning = "absolute"  # or "relative" or "mixed"

  # Via command line (future):
  --positioning absolute

2026-03-21 17:38:20 -07:00

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