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

dealplustech-astro/node_modules/parse-latin/lib/plugin/merge-final-word-symbol.js

@@ -1,45 +0,0 @@
-/**
- * @typedef {import('nlcst').Sentence} Sentence
- */
-
-import {toString} from 'nlcst-to-string'
-import {modifyChildren} from 'unist-util-modify-children'
-
-// Merge certain punctuation marks into their preceding words.
-export const mergeFinalWordSymbol = modifyChildren(
-  /**
-   * @type {import('unist-util-modify-children').Modifier<Sentence>}
-   */
-  function (child, index, parent) {
-    if (
-      index > 0 &&
-      (child.type === 'SymbolNode' || child.type === 'PunctuationNode') &&
-      toString(child) === '-'
-    ) {
-      const children = parent.children
-      const previous = children[index - 1]
-      const next = children[index + 1]
-
-      if (
-        (!next || next.type !== 'WordNode') &&
-        previous &&
-        previous.type === 'WordNode'
-      ) {
-        // Remove `child` from parent.
-        children.splice(index, 1)
-
-        // Add the punctuation mark at the end of the previous node.
-        previous.children.push(child)
-
-        // Update position.
-        if (previous.position && child.position) {
-          previous.position.end = child.position.end
-        }
-
-        // Next, iterate over the node *now* at the current position (which was
-        // the next node).
-        return index
-      }
-    }
-  }
-)