Add TypeScript theme generator for doki-master-theme palettes

Generates one Gitea-compatible CSS theme file per doki-master-theme
definition (88 themes). Each file contains a gitea-theme-meta-info
block and a :root block with the full set of CSS custom properties
derived from the character's colour palette.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

package.json

@@ -0,0 +1,14 @@
+{
+  "name": "gitea-doki-theme-generator",
+  "version": "1.0.0",
+  "type": "module",
+  "scripts": {
+    "generate": "tsx generate.ts",
+    "generate:watch": "tsx watch generate.ts"
+  },
+  "devDependencies": {
+    "tsx": "^4.19.4",
+    "typescript": "^5.8.3",
+    "@types/node": "^22.15.21"
+  }
+}