♻️ Restructure: Move Astro to repository root

BREAKING CHANGE: Astro project is now at repository root
- Removed dealplustech-astro subdirectory
- Moved all Astro files to root
- Updated PostCSS config to .cjs
- Removed old Next.js files

✅ 11 pages built successfully
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✅ Privacy/Terms links in footer
✅ Ready for Easypanel deployment (no root dir needed)

Migration path:
- Old structure: /dealplustech-astro/
- New structure: / (root)

dealplustech-astro/node_modules/zod-to-json-schema/dist/esm/Refs.js

@@ -1,22 +0,0 @@
-import { getDefaultOptions } from "./Options.js";
-export const getRefs = (options) => {
-    const _options = getDefaultOptions(options);
-    const currentPath = _options.name !== undefined
-        ? [..._options.basePath, _options.definitionPath, _options.name]
-        : _options.basePath;
-    return {
-        ..._options,
-        flags: { hasReferencedOpenAiAnyType: false },
-        currentPath: currentPath,
-        propertyPath: undefined,
-        seen: new Map(Object.entries(_options.definitions).map(([name, def]) => [
-            def._def,
-            {
-                def: def._def,
-                path: [..._options.basePath, _options.definitionPath, name],
-                // Resolution of references will be forced even though seen, so it's ok that the schema is undefined here for now.
-                jsonSchema: undefined,
-            },
-        ])),
-    };
-};