♻️ 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/micromark-util-decode-numeric-character-reference/dev/index.d.ts

@@ -1,16 +0,0 @@
-/**
- * Turn the number (in string form as either hexa- or plain decimal) coming from
- * a numeric character reference into a character.
- *
- * Sort of like `String.fromCodePoint(Number.parseInt(value, base))`, but makes
- * non-characters and control characters safe.
- *
- * @param {string} value
- *   Value to decode.
- * @param {number} base
- *   Numeric base.
- * @returns {string}
- *   Character.
- */
-export function decodeNumericCharacterReference(value: string, base: number): string;
-//# sourceMappingURL=index.d.ts.map

dealplustech-astro/node_modules/micromark-util-decode-numeric-character-reference/dev/index.d.ts.map

@@ -1 +0,0 @@
-{"version":3,"file":"index.d.ts","sourceRoot":"","sources":["index.js"],"names":[],"mappings":"AAEA;;;;;;;;;;;;;GAaG;AACH,uDAPW,MAAM,QAEN,MAAM,GAEJ,MAAM,CA4BlB"}

dealplustech-astro/node_modules/micromark-util-decode-numeric-character-reference/dev/index.js

@@ -1,42 +0,0 @@
-import {codes, values} from 'micromark-util-symbol'
-
-/**
- * Turn the number (in string form as either hexa- or plain decimal) coming from
- * a numeric character reference into a character.
- *
- * Sort of like `String.fromCodePoint(Number.parseInt(value, base))`, but makes
- * non-characters and control characters safe.
- *
- * @param {string} value
- *   Value to decode.
- * @param {number} base
- *   Numeric base.
- * @returns {string}
- *   Character.
- */
-export function decodeNumericCharacterReference(value, base) {
-  const code = Number.parseInt(value, base)
-
-  if (
-    // C0 except for HT, LF, FF, CR, space.
-    code < codes.ht ||
-    code === codes.vt ||
-    (code > codes.cr && code < codes.space) ||
-    // Control character (DEL) of C0, and C1 controls.
-    (code > codes.tilde && code < 160) ||
-    // Lone high surrogates and low surrogates.
-    (code > 55_295 && code < 57_344) ||
-    // Noncharacters.
-    (code > 64_975 && code < 65_008) ||
-    /* eslint-disable no-bitwise */
-    (code & 65_535) === 65_535 ||
-    (code & 65_535) === 65_534 ||
-    /* eslint-enable no-bitwise */
-    // Out of range
-    code > 1_114_111
-  ) {
-    return values.replacementCharacter
-  }
-
-  return String.fromCodePoint(code)
-}