Add halo-theme-dev skill & theme templates

Add a new .agents/skills/halo-theme-dev skill providing Halo theme development resources: two theme templates (theme-vite and theme-minimal) with theme.yaml/settings, Vite config, package.json, CSS and JS assets, and a full set of Thymeleaf template files/partials. Include comprehensive reference docs (structure & config, finder APIs, global variables, annotations, static resources, packaging, official plugins, thymeleaf tips) and an agents/openai.yaml interface. Also update project files: modify package.json, update tsconfig.json, add skills-lock.json, rename vite-env.d.ts and remove obsolete src/main.ts and src/styles/main.css while populating src/ with the new template files.

tsconfig.json

@@ -4,7 +4,7 @@
     "useDefineForClassFields": true,
     "module": "ESNext",
     "lib": ["ESNext", "DOM"],
-    "moduleResolution": "Node",
+    "moduleResolution": "bundler",
     "strict": true,
     "sourceMap": true,
     "resolveJsonModule": true,
@@ -16,5 +16,5 @@
     "noImplicitReturns": true,
     "skipLibCheck": true
   },
-  "include": ["src"]
+  "include": ["src", "./vite-env.d.ts"]
 }