♻️ 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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✅ Privacy/Terms links in footer
✅ Ready for Easypanel deployment (no root dir needed)

Migration path:
- Old structure: /dealplustech-astro/
- New structure: / (root)

dealplustech-astro/node_modules/github-slugger/index.js

@@ -1,77 +0,0 @@
-import { regex } from './regex.js'
-
-const own = Object.hasOwnProperty
-
-/**
- * Slugger.
- */
-export default class BananaSlug {
-  /**
-   * Create a new slug class.
-   */
-  constructor () {
-    /** @type {Record<string, number>} */
-    // eslint-disable-next-line no-unused-expressions
-    this.occurrences
-
-    this.reset()
-  }
-
-  /**
-   * Generate a unique slug.
-  *
-  * Tracks previously generated slugs: repeated calls with the same value
-  * will result in different slugs.
-  * Use the `slug` function to get same slugs.
-   *
-   * @param  {string} value
-   *   String of text to slugify
-   * @param  {boolean} [maintainCase=false]
-   *   Keep the current case, otherwise make all lowercase
-   * @return {string}
-   *   A unique slug string
-   */
-  slug (value, maintainCase) {
-    const self = this
-    let result = slug(value, maintainCase === true)
-    const originalSlug = result
-
-    while (own.call(self.occurrences, result)) {
-      self.occurrences[originalSlug]++
-      result = originalSlug + '-' + self.occurrences[originalSlug]
-    }
-
-    self.occurrences[result] = 0
-
-    return result
-  }
-
-  /**
-   * Reset - Forget all previous slugs
-   *
-   * @return void
-   */
-  reset () {
-    this.occurrences = Object.create(null)
-  }
-}
-
-/**
- * Generate a slug.
- *
- * Does not track previously generated slugs: repeated calls with the same value
- * will result in the exact same slug.
- * Use the `GithubSlugger` class to get unique slugs.
- *
- * @param  {string} value
- *   String of text to slugify
- * @param  {boolean} [maintainCase=false]
- *   Keep the current case, otherwise make all lowercase
- * @return {string}
- *   A unique slug string
- */
-export function slug (value, maintainCase) {
-  if (typeof value !== 'string') return ''
-  if (!maintainCase) value = value.toLowerCase()
-  return value.replace(regex, '').replace(/ /g, '-')
-}