♻️ 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-affix-symbol.js

@@ -1,47 +0,0 @@
-/**
- * @typedef {import('nlcst').Paragraph} Paragraph
- */
-
-import {toString} from 'nlcst-to-string'
-import {modifyChildren} from 'unist-util-modify-children'
-// Closing or final punctuation, or terminal markers that should still be
-// included in the previous sentence, even though they follow the sentence’s
-// terminal marker.
-import {affixSymbol} from '../expressions.js'
-
-// Move certain punctuation following a terminal marker (thus in the next
-// sentence) to the previous sentence.
-export const mergeAffixSymbol = modifyChildren(
-  /**
-   * @type {import('unist-util-modify-children').Modifier<Paragraph>}
-   */
-  function (child, index, parent) {
-    if ('children' in child && child.children.length > 0 && index > 0) {
-      const previous = parent.children[index - 1]
-      const first = child.children[0]
-      const second = child.children[1]
-
-      if (
-        previous &&
-        previous.type === 'SentenceNode' &&
-        (first.type === 'SymbolNode' || first.type === 'PunctuationNode') &&
-        affixSymbol.test(toString(first))
-      ) {
-        child.children.shift() // Remove `first`.
-        previous.children.push(first)
-
-        // Update position.
-        if (first.position && previous.position) {
-          previous.position.end = first.position.end
-        }
-
-        if (second && second.position && child.position) {
-          child.position.start = second.position.start
-        }
-
-        // Next, iterate over the previous node again.
-        return index - 1
-      }
-    }
-  }
-)