♻️ 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
✅ Cookie consent banner included
✅ 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/micromark-core-commonmark/dev/index.js

@@ -1,22 +0,0 @@
-export {attention} from './lib/attention.js'
-export {autolink} from './lib/autolink.js'
-export {blankLine} from './lib/blank-line.js'
-export {blockQuote} from './lib/block-quote.js'
-export {characterEscape} from './lib/character-escape.js'
-export {characterReference} from './lib/character-reference.js'
-export {codeFenced} from './lib/code-fenced.js'
-export {codeIndented} from './lib/code-indented.js'
-export {codeText} from './lib/code-text.js'
-export {content} from './lib/content.js'
-export {definition} from './lib/definition.js'
-export {hardBreakEscape} from './lib/hard-break-escape.js'
-export {headingAtx} from './lib/heading-atx.js'
-export {htmlFlow} from './lib/html-flow.js'
-export {htmlText} from './lib/html-text.js'
-export {labelEnd} from './lib/label-end.js'
-export {labelStartImage} from './lib/label-start-image.js'
-export {labelStartLink} from './lib/label-start-link.js'
-export {lineEnding} from './lib/line-ending.js'
-export {list} from './lib/list.js'
-export {setextUnderline} from './lib/setext-underline.js'
-export {thematicBreak} from './lib/thematic-break.js'