♻️ 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

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✅ Ready for Easypanel deployment (no root dir needed)

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

dealplustech-astro/node_modules/oniguruma-to-es/dist/esm/transform.d.ts

@@ -1,52 +0,0 @@
-export type RegexPlusAst = createAlternative & {
-    options: {
-        disable: {
-            [key: string]: boolean;
-        };
-        force: {
-            [key: string]: boolean;
-        };
-    };
-    _originMap: Map<createAlternative, createAlternative>;
-    _strategy: string | null;
-};
-/**
-@import {CapturingGroupNode, OnigurumaAst, Node} from 'oniguruma-parser/parser';
-@import {Visitor} from 'oniguruma-parser/traverser';
-*/
-/**
-@typedef {
-  OnigurumaAst & {
-    options: {
-      disable: {[key: string]: boolean};
-      force: {[key: string]: boolean};
-    };
-    _originMap: Map<CapturingGroupNode, CapturingGroupNode>;
-    _strategy: string | null;
-  }
-} RegexPlusAst
-*/
-/**
-Transforms an Oniguruma AST in-place to a [Regex+](https://github.com/slevithan/regex) AST.
-Assumes target ES2025, expecting the generator to down-convert to the desired JS target version.
-
-Regex+'s syntax and behavior is a strict superset of native JavaScript, so the AST is very close
-to representing native ES2025 `RegExp` but with some added features (atomic groups, possessive
-quantifiers, recursion). The AST doesn't use some of Regex+'s extended features like flag x or
-subroutines because they follow PCRE behavior and work somewhat differently than in Oniguruma. The
-AST represents what's needed to precisely reproduce Oniguruma behavior using Regex+.
-@param {OnigurumaAst} ast
-@param {{
-  accuracy?: keyof Accuracy;
-  asciiWordBoundaries?: boolean;
-  avoidSubclass?: boolean;
-  bestEffortTarget?: keyof Target;
-}} [options]
-@returns {RegexPlusAst}
-*/
-export function transform(ast: createAlternative, options?: {
-    accuracy?: "default" | "strict";
-    asciiWordBoundaries?: boolean;
-    avoidSubclass?: boolean;
-    bestEffortTarget?: "auto" | "ES2025" | "ES2024" | "ES2018";
-}): RegexPlusAst;