Add generic streaming interpreter with configurable sources/audio

- Add stream_sexp_generic.py: fully generic sexp interpreter
- Add streaming primitives for video sources and audio analysis
- Add config system for external sources and audio files
- Add templates for reusable scans and macros
- Fix video/audio stream mapping in file output
- Add dynamic source cycling based on sources array length
- Remove old Python effect files (migrated to sexp)
- Update sexp effects to use namespaced primitives

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

sexp_effects/effects/kaleidoscope.sexp

@@ -1,4 +1,5 @@
 ;; Kaleidoscope effect - mandala-like symmetry patterns
+(require-primitives "geometry" "image")
 
 (define-effect kaleidoscope
   :params (
@@ -9,11 +10,11 @@
     (center_y :type float :default 0.5 :range [0 1])
     (zoom :type int :default 1 :range [0.5 3])
   )
-  (let* ((w (width frame))
-         (h (height frame))
+  (let* ((w (image:width frame))
+         (h (image:height frame))
          (cx (* w center_x))
          (cy (* h center_y))
          ;; Total rotation including time-based animation
          (total_rot (+ rotation (* rotation_speed (or _time 0))))
-         (coords (kaleidoscope-displace w h segments total_rot cx cy zoom)))
-    (remap frame (coords-x coords) (coords-y coords))))
+         (coords (geometry:kaleidoscope-coords w h segments total_rot cx cy zoom)))
+    (geometry:remap frame (geometry:coords-x coords) (geometry:coords-y coords))))