Scaffold: Vite + React 19 + Tailwind 3, PIG's token layer, the demo contract

Foundation for a gallery of RL-environment demos. Three decisions worth
recording here rather than in a commit nobody reads:

The word lists are built, not copied. `envs/wordle_five/words/build_words.py`
intersects Wordnik (MIT, 11,846 five-letter words) with SCOWL's common-American
tier to produce 4,603 answers. The intersection is the point: the list is
derived from two permissive sources by a stated rule rather than copied from
anyone's editorial selection, and both inputs are committed so a rebuild is
byte-identical.

The design tokens are PIG's, inlined as literals. PIG writes its accent onto
the root at runtime because a user picks it; this site has no such choice, so
the runtime theme layer would be a moving part buying nothing. Board tiles get
their own named tokens with measured contrast ratios, because the board is the
one place where colour carries meaning.

pnpm 11 no longer reads the "pnpm" field in package.json. Settings live in
pnpm-workspace.yaml, and an unapproved build script makes `pnpm install` exit 1
rather than warn — so this would have failed CI on a clean checkout, not here.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_019mt6sHQHEnEYrJZvoMCJSB

components.json

@@ -0,0 +1,21 @@
+{
+  "$schema": "https://ui.shadcn.com/schema.json",
+  "style": "new-york",
+  "rsc": false,
+  "tsx": true,
+  "tailwind": {
+    "config": "tailwind.config.js",
+    "css": "src/index.css",
+    "baseColor": "zinc",
+    "cssVariables": true,
+    "prefix": ""
+  },
+  "iconLibrary": "lucide",
+  "aliases": {
+    "components": "@/components",
+    "utils": "@/lib/utils",
+    "ui": "@/components/ui",
+    "lib": "@/lib",
+    "hooks": "@/hooks"
+  }
+}