♻️ 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/hard-break-escape.js

@@ -1,60 +0,0 @@
-/**
- * @import {
- *   Construct,
- *   State,
- *   TokenizeContext,
- *   Tokenizer
- * } from 'micromark-util-types'
- */
-
-import { markdownLineEnding } from 'micromark-util-character';
-/** @type {Construct} */
-export const hardBreakEscape = {
-  name: 'hardBreakEscape',
-  tokenize: tokenizeHardBreakEscape
-};
-
-/**
- * @this {TokenizeContext}
- *   Context.
- * @type {Tokenizer}
- */
-function tokenizeHardBreakEscape(effects, ok, nok) {
-  return start;
-
-  /**
-   * Start of a hard break (escape).
-   *
-   * ```markdown
-   * > | a\
-   *      ^
-   *   | b
-   * ```
-   *
-   * @type {State}
-   */
-  function start(code) {
-    effects.enter("hardBreakEscape");
-    effects.consume(code);
-    return after;
-  }
-
-  /**
-   * After `\`, at eol.
-   *
-   * ```markdown
-   * > | a\
-   *       ^
-   *   | b
-   * ```
-   *
-   *  @type {State}
-   */
-  function after(code) {
-    if (markdownLineEnding(code)) {
-      effects.exit("hardBreakEscape");
-      return ok(code);
-    }
-    return nok(code);
-  }
-}