Distortion tools (Width, Liquify, Puppet Warp, Perspective Grid), Patterns + Repeat, colour management (CMS, proofing, separations), Preferences/Shortcuts/Workspaces; original brand mark; fix filter panic in thumbnails; README demo scenes

- New original DrawCraft mark (gradient + pen nib) replaces the two-letter badge
- render: thumbnails and pattern tiles use a single-threaded context (vello's default is
  multithreaded and panics on filters); per-item raster effects detected
- Type tool state no longer leaks across documents
- ui.set {status} for clean screenshots
- README: new hero, feature shots, Made in DrawCraft gallery; examples/neon-drive, ribbons,
  feature-sheet; ASSETS.md updated; heading renamed to Crafting Apps

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

crates/render/src/pattern.rs

@@ -61,7 +61,7 @@ pub(crate) fn raster_scale(s: f64, period: (f64, f64)) -> f64 {
 /// Rasterize `region` (pattern space) of the infinite tiling into a `w`×`h` pixmap.
 fn rasterize(r: &mut Renderer, doc: &Document, def: &PatternDef, region: Rect, w: u16, h: u16) -> Pixmap {
     let (w, h) = (w.max(1), h.max(1));
-    let mut ctx = RenderContext::new(w, h);
+    let mut ctx = crate::single_threaded_context(w, h);
     let view = Affine::scale_non_uniform(w as f64 / region.width().max(1e-9), h as f64 / region.height().max(1e-9))
         * Affine::translate(-region.origin().to_vec2());
     let opts = RenderOptions::default();