Add JAX typography, xector primitives, deferred effect chains, and GPU streaming

- Add JAX text rendering with font atlas, styled text placement, and typography primitives
- Add xector (element-wise/reduction) operations library and sexp effects
- Add deferred effect chain fusion for JIT-compiled effect pipelines
- Expand drawing primitives with font management, alignment, shadow, and outline
- Add interpreter support for function-style define and require
- Add GPU persistence mode and hardware decode support to streaming
- Add new sexp effects: cell_pattern, halftone, mosaic, and derived definitions
- Add path registry for asset resolution
- Add integration, primitives, and xector tests

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

sexp_effects/effects/trails.sexp

@@ -5,16 +5,16 @@
   :params (
     (persistence :type float :default 0.8 :range [0 0.99])
   )
-  (let* ((buffer (state-get 'buffer nil))
+  (let* ((buffer (state-get "buffer" nil))
          (current frame))
     (if (= buffer nil)
         (begin
-          (state-set 'buffer (copy frame))
+          (state-set "buffer" (copy frame))
           frame)
         (let* ((faded (blending:blend-images buffer
                                     (make-image (image:width frame) (image:height frame) (list 0 0 0))
                                     (- 1 persistence)))
                (result (blending:blend-mode faded current "lighten")))
           (begin
-            (state-set 'buffer result)
+            (state-set "buffer" result)
             result)))))