chore(01-design-tokens-rams-foundation-01): scaffold npm workspace + theme package

- Root package.json: araharah, private, type module, workspaces [theme], scripts delegating to theme (build/sheet/gallery/audit/capture)
- theme/package.json: @araharah/theme with tailwindcss v4 + @tailwindcss/cli v4 devDeps, playwright dep (plan 03/04 captures), build + send scripts (D-15, D-17 local-only)

package.json

@@ -0,0 +1,15 @@
+{
+  "name": "araharah",
+  "private": true,
+  "type": "module",
+  "workspaces": [
+    "theme"
+  ],
+  "scripts": {
+    "build": "npm run build --workspace theme",
+    "sheet": "npm run sheet --workspace theme",
+    "gallery": "npm run gallery --workspace theme",
+    "audit": "npm run audit --workspace theme",
+    "capture": "npm run capture --workspace theme"
+  }
+}

theme/package.json

@@ -0,0 +1,15 @@
+{
+  "name": "@araharah/theme",
+  "type": "module",
+  "devDependencies": {
+    "@tailwindcss/cli": "^4.0.0",
+    "tailwindcss": "^4.0.0"
+  },
+  "dependencies": {
+    "playwright": "^1.50.0"
+  },
+  "scripts": {
+    "build": "tailwindcss -i ./src/theme.css -o ./dist/rams.css --minify",
+    "send": "mkdir -p dist/fonts && cp -r fonts/geist fonts/space-grotesk dist/fonts/"
+  }
+}