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>

configs/audio-dizzy.sexp

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+;; Audio Configuration - dizzy.mp3
+;;
+;; Defines audio analyzer and playback for a recipe.
+;; Pass to recipe with: --audio configs/audio-dizzy.sexp
+;;
+;; Provides:
+;;   - music: audio analyzer for beat/energy detection
+;;   - audio-playback: path for synchronized playback
+
+(require-primitives "streaming")
+
+;; Audio analyzer (provides beat detection and energy levels)
+;; Paths relative to working directory (project root)
+(def music (streaming:make-audio-analyzer "dizzy.mp3"))
+
+;; Audio playback path (for sync with video output)
+(audio-playback "dizzy.mp3")

configs/audio-halleluwah.sexp

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+;; Audio Configuration - dizzy.mp3
+;;
+;; Defines audio analyzer and playback for a recipe.
+;; Pass to recipe with: --audio configs/audio-dizzy.sexp
+;;
+;; Provides:
+;;   - music: audio analyzer for beat/energy detection
+;;   - audio-playback: path for synchronized playback
+
+(require-primitives "streaming")
+
+;; Audio analyzer (provides beat detection and energy levels)
+;; Paths relative to working directory (project root)
+(def music (streaming:make-audio-analyzer "woods_half/halleluwah.webm"))
+
+;; Audio playback path (for sync with video output)
+(audio-playback "woods_half/halleluwah.webm")

configs/sources-default.sexp

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+;; Default Sources Configuration
+;;
+;; Defines video sources and per-pair effect configurations.
+;; Pass to recipe with: --sources configs/sources-default.sexp
+;;
+;; Required by recipes using process-pair macro:
+;;   - sources: array of video sources
+;;   - pair-configs: array of effect configurations per source
+
+(require-primitives "streaming")
+
+;; Video sources array
+;; Paths relative to working directory (project root)
+(def sources [
+  (streaming:make-video-source "monday.webm" 30)
+  (streaming:make-video-source "escher.webm" 30)
+  (streaming:make-video-source "2.webm" 30)
+  (streaming:make-video-source "disruptors.webm" 30)
+  (streaming:make-video-source "4.mp4" 30)
+  (streaming:make-video-source "ecstacy.mp4" 30)
+  (streaming:make-video-source "dopple.webm" 30)
+  (streaming:make-video-source "5.mp4" 30)
+])
+
+;; Per-pair effect config: rotation direction, rotation ranges, zoom ranges
+;; :dir = rotation direction (1 or -1)
+;; :rot-a, :rot-b = max rotation angles for clip A and B
+;; :zoom-a, :zoom-b = max zoom amounts for clip A and B
+(def pair-configs [
+  {:dir -1 :rot-a 45 :rot-b -45 :zoom-a 1.5 :zoom-b 0.5}    ;; 0: monday
+  {:dir 1  :rot-a 45 :rot-b -45 :zoom-a 1.5 :zoom-b 0.5}    ;; 1: escher
+  {:dir 1  :rot-a 45 :rot-b -45 :zoom-a 1.5 :zoom-b 0.5}    ;; 2: vid2
+  {:dir -1 :rot-a -45 :rot-b 45 :zoom-a 0.5 :zoom-b 1.5}    ;; 3: disruptors (reversed)
+  {:dir -1 :rot-a 45 :rot-b -45 :zoom-a 1.5 :zoom-b 0.5}    ;; 4: vid4
+  {:dir 1  :rot-a 30 :rot-b -30 :zoom-a 1.3 :zoom-b 0.7}    ;; 5: ecstacy (smaller)
+  {:dir -1 :rot-a -45 :rot-b 45 :zoom-a 0.5 :zoom-b 1.5}    ;; 6: dopple (reversed)
+  {:dir 1  :rot-a 45 :rot-b -45 :zoom-a 1.5 :zoom-b 0.5}    ;; 7: vid5
+])

configs/sources-woods-half.sexp

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+;; Half-resolution Woods Sources (960x540)
+;;
+;; Pass to recipe with: --sources configs/sources-woods-half.sexp
+
+(require-primitives "streaming")
+
+(def sources [
+  (streaming:make-video-source "woods_half/1.webm" 30)
+  (streaming:make-video-source "woods_half/2.webm" 30)
+  (streaming:make-video-source "woods_half/3.webm" 30)
+  (streaming:make-video-source "woods_half/4.webm" 30)
+])
+
+(def pair-configs [
+  {:dir -1 :rot-a 45 :rot-b -45 :zoom-a 1.5 :zoom-b 0.5}
+  {:dir 1  :rot-a 45 :rot-b -45 :zoom-a 1.5 :zoom-b 0.5}
+  {:dir 1  :rot-a 45 :rot-b -45 :zoom-a 1.5 :zoom-b 0.5}
+  {:dir -1 :rot-a -45 :rot-b 45 :zoom-a 0.5 :zoom-b 1.5}
+])

configs/sources-woods.sexp

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+;; Default Sources Configuration
+;;
+;; Defines video sources and per-pair effect configurations.
+;; Pass to recipe with: --sources configs/sources-default.sexp
+;;
+;; Required by recipes using process-pair macro:
+;;   - sources: array of video sources
+;;   - pair-configs: array of effect configurations per source
+
+(require-primitives "streaming")
+
+;; Video sources array
+;; Paths relative to working directory (project root)
+(def sources [
+  (streaming:make-video-source "woods/1.webm" 10)
+  (streaming:make-video-source "woods/2.webm" 10)
+  (streaming:make-video-source "woods/3.webm" 10)
+  (streaming:make-video-source "woods/4.webm" 10)
+  (streaming:make-video-source "woods/5.webm" 10)
+  (streaming:make-video-source "woods/6.webm" 10)
+  (streaming:make-video-source "woods/7.webm" 10)
+  (streaming:make-video-source "woods/8.webm" 10)
+])
+
+;; Per-pair effect config: rotation direction, rotation ranges, zoom ranges
+;; :dir = rotation direction (1 or -1)
+;; :rot-a, :rot-b = max rotation angles for clip A and B
+;; :zoom-a, :zoom-b = max zoom amounts for clip A and B
+(def pair-configs [
+  {:dir -1 :rot-a 45 :rot-b -45 :zoom-a 1.5 :zoom-b 0.5}    ;; 0: monday
+  {:dir 1  :rot-a 45 :rot-b -45 :zoom-a 1.5 :zoom-b 0.5}    ;; 1: escher
+  {:dir 1  :rot-a 45 :rot-b -45 :zoom-a 1.5 :zoom-b 0.5}    ;; 2: vid2
+  {:dir -1 :rot-a -45 :rot-b 45 :zoom-a 0.5 :zoom-b 1.5}    ;; 3: disruptors (reversed)
+  {:dir -1 :rot-a 45 :rot-b -45 :zoom-a 1.5 :zoom-b 0.5}    ;; 0: monday
+  {:dir 1  :rot-a 45 :rot-b -45 :zoom-a 1.5 :zoom-b 0.5}    ;; 1: escher
+  {:dir -1 :rot-a 45 :rot-b -45 :zoom-a 1.5 :zoom-b 0.5}    ;; 0: monday
+  {:dir 1  :rot-a 45 :rot-b -45 :zoom-a 1.5 :zoom-b 0.5}    ;; 1: escher
+  
+])