♻️ 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
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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.js

@@ -1,33 +0,0 @@
-Prism.languages['dns-zone-file'] = {
-	'comment': /;.*/,
-	'string': {
-		pattern: /"(?:\\.|[^"\\\r\n])*"/,
-		greedy: true
-	},
-	'variable': [
-		{
-			pattern: /(^\$ORIGIN[ \t]+)\S+/m,
-			lookbehind: true,
-		},
-		{
-			pattern: /(^|\s)@(?=\s|$)/,
-			lookbehind: true,
-		}
-	],
-	'keyword': /^\$(?:INCLUDE|ORIGIN|TTL)(?=\s|$)/m,
-	'class': {
-		// https://tools.ietf.org/html/rfc1035#page-13
-		pattern: /(^|\s)(?:CH|CS|HS|IN)(?=\s|$)/,
-		lookbehind: true,
-		alias: 'keyword'
-	},
-	'type': {
-		// https://en.wikipedia.org/wiki/List_of_DNS_record_types
-		pattern: /(^|\s)(?:A|A6|AAAA|AFSDB|APL|ATMA|CAA|CDNSKEY|CDS|CERT|CNAME|DHCID|DLV|DNAME|DNSKEY|DS|EID|GID|GPOS|HINFO|HIP|IPSECKEY|ISDN|KEY|KX|LOC|MAILA|MAILB|MB|MD|MF|MG|MINFO|MR|MX|NAPTR|NB|NBSTAT|NIMLOC|NINFO|NS|NSAP|NSAP-PTR|NSEC|NSEC3|NSEC3PARAM|NULL|NXT|OPENPGPKEY|PTR|PX|RKEY|RP|RRSIG|RT|SIG|SINK|SMIMEA|SOA|SPF|SRV|SSHFP|TA|TKEY|TLSA|TSIG|TXT|UID|UINFO|UNSPEC|URI|WKS|X25)(?=\s|$)/,
-		lookbehind: true,
-		alias: 'keyword'
-	},
-	'punctuation': /[()]/
-};
-
-Prism.languages['dns-zone'] = Prism.languages['dns-zone-file'];