♻️ 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/micromark-core-commonmark/lib/character-escape.js

@@ -1,64 +0,0 @@
-/**
- * @import {
- *   Construct,
- *   State,
- *   TokenizeContext,
- *   Tokenizer
- * } from 'micromark-util-types'
- */
-
-import { asciiPunctuation } from 'micromark-util-character';
-/** @type {Construct} */
-export const characterEscape = {
-  name: 'characterEscape',
-  tokenize: tokenizeCharacterEscape
-};
-
-/**
- * @this {TokenizeContext}
- *   Context.
- * @type {Tokenizer}
- */
-function tokenizeCharacterEscape(effects, ok, nok) {
-  return start;
-
-  /**
-   * Start of character escape.
-   *
-   * ```markdown
-   * > | a\*b
-   *      ^
-   * ```
-   *
-   * @type {State}
-   */
-  function start(code) {
-    effects.enter("characterEscape");
-    effects.enter("escapeMarker");
-    effects.consume(code);
-    effects.exit("escapeMarker");
-    return inside;
-  }
-
-  /**
-   * After `\`, at punctuation.
-   *
-   * ```markdown
-   * > | a\*b
-   *       ^
-   * ```
-   *
-   * @type {State}
-   */
-  function inside(code) {
-    // ASCII punctuation.
-    if (asciiPunctuation(code)) {
-      effects.enter("characterEscapeValue");
-      effects.consume(code);
-      effects.exit("characterEscapeValue");
-      effects.exit("characterEscape");
-      return ok;
-    }
-    return nok(code);
-  }
-}