feat(canvas): extract WebGL/canvas-app content + fix site arg-order + adopt skill doc

canvas — chrome-use can now read canvas/WebGL apps (Figma, games, maps, charts,
drawing tools) that expose no DOM/refs:
  - canvas list: enumerate <canvas> (backing+CSS size, visibility, toDataUrl/tainted)
  - canvas capture [selector] [path]: save rendered pixels to PNG — toDataURL
    (full backing-store resolution), with a CDP screenshot fallback for WebGL
    without preserveDrawingBuffer or cross-origin-tainted canvases. --screenshot
    forces the screenshot path. Gets the RENDER, not hidden source data.
  Verified live: captured Figma's canvas at full 2522x1904 via toDataURL.

site — fix map_args losing the adapter's declared arg order: serde sorts @meta
keys alphabetically, so a 2-arg adapter like {projectId, path} mapped positionals
to {path, projectId} (swapped). Now parses declaration order from the raw @meta
text (Adapter.arg_order) + regression test. Affects any multi-arg adapter.

skill — core skill now documents `adopt <url|targetId>` (read a pre-existing tab,
the explicit way through strict isolation) and `canvas list`/`canvas capture` in
the canvas/WebGL section.

863 tests pass.

package.json

@@ -1,6 +1,6 @@
 {
   "name": "chrome-use",
-  "version": "1.5.23",
+  "version": "1.5.24",
   "description": "chrome-use — drive your real, logged-in Chrome from any AI agent, stealth by default",
   "type": "module",
   "packageManager": "pnpm@11.1.3",