♻️ 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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✅ 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/blank-line.js

@@ -1,61 +0,0 @@
-/**
- * @import {
- *   Construct,
- *   State,
- *   TokenizeContext,
- *   Tokenizer
- * } from 'micromark-util-types'
- */
-
-import { factorySpace } from 'micromark-factory-space';
-import { markdownLineEnding, markdownSpace } from 'micromark-util-character';
-/** @type {Construct} */
-export const blankLine = {
-  partial: true,
-  tokenize: tokenizeBlankLine
-};
-
-/**
- * @this {TokenizeContext}
- *   Context.
- * @type {Tokenizer}
- */
-function tokenizeBlankLine(effects, ok, nok) {
-  return start;
-
-  /**
-   * Start of blank line.
-   *
-   * > 👉 **Note**: `␠` represents a space character.
-   *
-   * ```markdown
-   * > | ␠␠␊
-   *     ^
-   * > | ␊
-   *     ^
-   * ```
-   *
-   * @type {State}
-   */
-  function start(code) {
-    return markdownSpace(code) ? factorySpace(effects, after, "linePrefix")(code) : after(code);
-  }
-
-  /**
-   * At eof/eol, after optional whitespace.
-   *
-   * > 👉 **Note**: `␠` represents a space character.
-   *
-   * ```markdown
-   * > | ␠␠␊
-   *       ^
-   * > | ␊
-   *     ^
-   * ```
-   *
-   * @type {State}
-   */
-  function after(code) {
-    return code === null || markdownLineEnding(code) ? ok(code) : nok(code);
-  }
-}