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/parser.py

@@ -71,7 +71,8 @@ class Tokenizer:
     STRING = re.compile(r'"(?:[^"\\]|\\.)*"')
     NUMBER = re.compile(r'-?(?:\d+\.?\d*|\.\d+)(?:[eE][+-]?\d+)?')
     KEYWORD = re.compile(r':[a-zA-Z_][a-zA-Z0-9_-]*')
-    SYMBOL = re.compile(r'[a-zA-Z_*+\-><=/!?][a-zA-Z0-9_*+\-><=/!?.:]*')
+    # Symbol pattern includes Greek letters α (alpha) and β (beta) for xector operations
+    SYMBOL = re.compile(r'[a-zA-Z_*+\-><=/!?αβ²λ][a-zA-Z0-9_*+\-><=/!?.:αβ²λ]*')
 
     def __init__(self, text: str):
         self.text = text