Initial commit: video effects processing system

Add S-expression based video effects pipeline with modular effect
definitions, constructs, and recipe files.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

run-file.sh

@@ -0,0 +1,7 @@
+#!/bin/bash
+# Run the full pipeline: analyze -> plan -> execute -> play
+# Usage: ./run.sh recipe.sexp
+
+RECIPE="${1:-recipe-bound.sexp}"
+
+python analyze.py "$RECIPE" | python plan.py "$RECIPE" -a - | python execute.py - -d "$(dirname "$RECIPE")" -o output.mp4