♻️ 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/prismjs/components/prism-sparql.min.js

@@ -1 +0,0 @@
-Prism.languages.sparql=Prism.languages.extend("turtle",{boolean:/\b(?:false|true)\b/i,variable:{pattern:/[?$]\w+/,greedy:!0}}),Prism.languages.insertBefore("sparql","punctuation",{keyword:[/\b(?:A|ADD|ALL|AS|ASC|ASK|BNODE|BY|CLEAR|CONSTRUCT|COPY|CREATE|DATA|DEFAULT|DELETE|DESC|DESCRIBE|DISTINCT|DROP|EXISTS|FILTER|FROM|GROUP|HAVING|INSERT|INTO|LIMIT|LOAD|MINUS|MOVE|NAMED|NOT|NOW|OFFSET|OPTIONAL|ORDER|RAND|REDUCED|SELECT|SEPARATOR|SERVICE|SILENT|STRUUID|UNION|USING|UUID|VALUES|WHERE)\b/i,/\b(?:ABS|AVG|BIND|BOUND|CEIL|COALESCE|CONCAT|CONTAINS|COUNT|DATATYPE|DAY|ENCODE_FOR_URI|FLOOR|GROUP_CONCAT|HOURS|IF|IRI|isBLANK|isIRI|isLITERAL|isNUMERIC|isURI|LANG|LANGMATCHES|LCASE|MAX|MD5|MIN|MINUTES|MONTH|REGEX|REPLACE|ROUND|sameTerm|SAMPLE|SECONDS|SHA1|SHA256|SHA384|SHA512|STR|STRAFTER|STRBEFORE|STRDT|STRENDS|STRLANG|STRLEN|STRSTARTS|SUBSTR|SUM|TIMEZONE|TZ|UCASE|URI|YEAR)\b(?=\s*\()/i,/\b(?:BASE|GRAPH|PREFIX)\b/i]}),Prism.languages.rq=Prism.languages.sparql;