♻️ 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/unist-util-position/lib/index.d.ts

@@ -1,45 +0,0 @@
-/**
- * Get the positional info of `node`.
- *
- * @param {Node | NodeLike | null | undefined} [node]
- *   Node.
- * @returns {Position | undefined}
- *   Position.
- */
-export function position(
-  node?: Node | NodeLike | null | undefined
-): Position | undefined
-/**
- * Get the point info of `node` at a bound side.
- *
- * @param {Node | NodeLike | null | undefined} [node]
- * @returns {Point | undefined}
- */
-export function pointEnd(
-  node?: Node | NodeLike | null | undefined
-): Point | undefined
-/**
- * Get the point info of `node` at a bound side.
- *
- * @param {Node | NodeLike | null | undefined} [node]
- * @returns {Point | undefined}
- */
-export function pointStart(
-  node?: Node | NodeLike | null | undefined
-): Point | undefined
-export type Node = import('unist').Node
-export type Point = import('unist').Point
-export type Position = import('unist').Position
-export type NodeLike = {
-  type: string
-  position?: PositionLike | null | undefined
-}
-export type PositionLike = {
-  start?: PointLike | null | undefined
-  end?: PointLike | null | undefined
-}
-export type PointLike = {
-  line?: number | null | undefined
-  column?: number | null | undefined
-  offset?: number | null | undefined
-}