♻️ 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/prismjs/components/prism-dns-zone-file.min.js

@@ -1 +0,0 @@
-Prism.languages["dns-zone-file"]={comment:/;.*/,string:{pattern:/"(?:\\.|[^"\\\r\n])*"/,greedy:!0},variable:[{pattern:/(^\$ORIGIN[ \t]+)\S+/m,lookbehind:!0},{pattern:/(^|\s)@(?=\s|$)/,lookbehind:!0}],keyword:/^\$(?:INCLUDE|ORIGIN|TTL)(?=\s|$)/m,class:{pattern:/(^|\s)(?:CH|CS|HS|IN)(?=\s|$)/,lookbehind:!0,alias:"keyword"},type:{pattern:/(^|\s)(?:A|A6|AAAA|AFSDB|APL|ATMA|CAA|CDNSKEY|CDS|CERT|CNAME|DHCID|DLV|DNAME|DNSKEY|DS|EID|GID|GPOS|HINFO|HIP|IPSECKEY|ISDN|KEY|KX|LOC|MAILA|MAILB|MB|MD|MF|MG|MINFO|MR|MX|NAPTR|NB|NBSTAT|NIMLOC|NINFO|NS|NSAP|NSAP-PTR|NSEC|NSEC3|NSEC3PARAM|NULL|NXT|OPENPGPKEY|PTR|PX|RKEY|RP|RRSIG|RT|SIG|SINK|SMIMEA|SOA|SPF|SRV|SSHFP|TA|TKEY|TLSA|TSIG|TXT|UID|UINFO|UNSPEC|URI|WKS|X25)(?=\s|$)/,lookbehind:!0,alias:"keyword"},punctuation:/[()]/},Prism.languages["dns-zone"]=Prism.languages["dns-zone-file"];