♻️ 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/mdast-util-to-markdown/lib/handle/break.js

@@ -1,30 +0,0 @@
-/**
- * @import {Break, Parents} from 'mdast'
- * @import {Info, State} from 'mdast-util-to-markdown'
- */
-
-import {patternInScope} from '../util/pattern-in-scope.js'
-
-/**
- * @param {Break} _
- * @param {Parents | undefined} _1
- * @param {State} state
- * @param {Info} info
- * @returns {string}
- */
-export function hardBreak(_, _1, state, info) {
-  let index = -1
-
-  while (++index < state.unsafe.length) {
-    // If we can’t put eols in this construct (setext headings, tables), use a
-    // space instead.
-    if (
-      state.unsafe[index].character === '\n' &&
-      patternInScope(state.stack, state.unsafe[index])
-    ) {
-      return /[ \t]/.test(info.before) ? '' : ' '
-    }
-  }
-
-  return '\\\n'
-}