Shader graph: UV, Sample texture, Texture size, Time, Sin/Floor/Fract/Step; edge mode on Output (#78)

Fragment-side coordinate nodes instead of vertex nodes: the quad stays the
quad, a UV read plus a sample at a computed coordinate covers flip, scroll,
wave, pixelate and scanlines. Time is a uniform only when a Time node reaches
the Output; a viewport that drew a Time shader redraws from the ticker so the
Scene tab animates without a running world. Edge (Mirror/Repeat/Clamp) is a
second texture variant in TextureLibrary because WebGL binds no TextureStyle
resource of the shader. The compiler now emits #version 300 es first: Pixi
only compiles as ES 3.00 when the fragment says so, and textureSize needs it.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

src/editor/Editor.ts

@@ -325,6 +325,8 @@ export class Editor implements PlayHost {
     this.measureFps(dt);
     this.play.tick(dt);
     this.editorRun.tick(dt);
+    this.viewport.animate();
+    this.gameView.animate();
     this.console.refresh();
     if (this.tab === 'animation') this.animationEditor.tick(dt);
   }