♻️ 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-io.min.js

@@ -1 +0,0 @@
-Prism.languages.io={comment:{pattern:/(^|[^\\])(?:\/\*[\s\S]*?(?:\*\/|$)|\/\/.*|#.*)/,lookbehind:!0,greedy:!0},"triple-quoted-string":{pattern:/"""(?:\\[\s\S]|(?!""")[^\\])*"""/,greedy:!0,alias:"string"},string:{pattern:/"(?:\\.|[^\\\r\n"])*"/,greedy:!0},keyword:/\b(?:activate|activeCoroCount|asString|block|break|call|catch|clone|collectGarbage|compileString|continue|do|doFile|doMessage|doString|else|elseif|exit|for|foreach|forward|getEnvironmentVariable|getSlot|hasSlot|if|ifFalse|ifNil|ifNilEval|ifTrue|isActive|isNil|isResumable|list|message|method|parent|pass|pause|perform|performWithArgList|print|println|proto|raise|raiseResumable|removeSlot|resend|resume|schedulerSleepSeconds|self|sender|setSchedulerSleepSeconds|setSlot|shallowCopy|slotNames|super|system|then|thisBlock|thisContext|try|type|uniqueId|updateSlot|wait|while|write|yield)\b/,builtin:/\b(?:Array|AudioDevice|AudioMixer|BigNum|Block|Box|Buffer|CFunction|CGI|Color|Curses|DBM|DNSResolver|DOConnection|DOProxy|DOServer|Date|Directory|Duration|DynLib|Error|Exception|FFT|File|Fnmatch|Font|Future|GL|GLE|GLScissor|GLU|GLUCylinder|GLUQuadric|GLUSphere|GLUT|Host|Image|Importer|LinkList|List|Lobby|Locals|MD5|MP3Decoder|MP3Encoder|Map|Message|Movie|Notification|Number|Object|OpenGL|Point|Protos|Random|Regex|SGML|SGMLElement|SGMLParser|SQLite|Sequence|Server|ShowMessage|SleepyCat|SleepyCatCursor|Socket|SocketManager|Sound|Soup|Store|String|Tree|UDPSender|UPDReceiver|URL|User|Warning|WeakLink)\b/,boolean:/\b(?:false|nil|true)\b/,number:/\b0x[\da-f]+\b|(?:\b\d+(?:\.\d*)?|\B\.\d+)(?:e-?\d+)?/i,operator:/[=!*/%+\-^&|]=|>>?=?|<<?=?|:?:?=|\+\+?|--?|\*\*?|\/\/?|%|\|\|?|&&?|\b(?:and|not|or|return)\b|@@?|\?\??|\.\./,punctuation:/[{}[\];(),.:]/};