♻️ 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/util/pattern-in-scope.js

@@ -1,41 +0,0 @@
-/**
- * @import {ConstructName, Unsafe} from 'mdast-util-to-markdown'
- */
-
-/**
- * @param {Array<ConstructName>} stack
- * @param {Unsafe} pattern
- * @returns {boolean}
- */
-export function patternInScope(stack, pattern) {
-  return (
-    listInScope(stack, pattern.inConstruct, true) &&
-    !listInScope(stack, pattern.notInConstruct, false)
-  )
-}
-
-/**
- * @param {Array<ConstructName>} stack
- * @param {Unsafe['inConstruct']} list
- * @param {boolean} none
- * @returns {boolean}
- */
-function listInScope(stack, list, none) {
-  if (typeof list === 'string') {
-    list = [list]
-  }
-
-  if (!list || list.length === 0) {
-    return none
-  }
-
-  let index = -1
-
-  while (++index < list.length) {
-    if (stack.includes(list[index])) {
-      return true
-    }
-  }
-
-  return false
-}