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/neon_glow.sexp

@@ -1,4 +1,5 @@
 ;; Neon Glow effect - glowing edge effect
+(require-primitives "image" "blending")
 
 (define-effect neon_glow
   :params (
@@ -8,15 +9,15 @@
     (glow_intensity :type int :default 2 :range [0.5 5])
     (background :type float :default 0.3 :range [0 1])
   )
-  (let* ((edge-img (edges frame edge_low edge_high))
-         (glow (blur edge-img glow_radius))
+  (let* ((edge-img (image:edge-detect frame edge_low edge_high))
+         (glow (image:blur edge-img glow_radius))
          ;; Intensify the glow
          (bright-glow (map-pixels glow
                         (lambda (x y c)
                           (rgb (clamp (* (red c) glow_intensity) 0 255)
                                (clamp (* (green c) glow_intensity) 0 255)
                                (clamp (* (blue c) glow_intensity) 0 255))))))
-    (blend-mode (blend-images frame (make-image (width frame) (height frame) (list 0 0 0))
+    (blending:blend-mode (blending:blend-images frame (make-image (image:width frame) (image:height frame) (list 0 0 0))
                               (- 1 background))
                 bright-glow
                 "screen")))