♻️ 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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✅ 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-erlang.min.js

@@ -1 +0,0 @@
-Prism.languages.erlang={comment:/%.+/,string:{pattern:/"(?:\\.|[^\\"\r\n])*"/,greedy:!0},"quoted-function":{pattern:/'(?:\\.|[^\\'\r\n])+'(?=\()/,alias:"function"},"quoted-atom":{pattern:/'(?:\\.|[^\\'\r\n])+'/,alias:"atom"},boolean:/\b(?:false|true)\b/,keyword:/\b(?:after|begin|case|catch|end|fun|if|of|receive|try|when)\b/,number:[/\$\\?./,/\b\d+#[a-z0-9]+/i,/(?:\b\d+(?:\.\d*)?|\B\.\d+)(?:e[+-]?\d+)?/i],function:/\b[a-z][\w@]*(?=\()/,variable:{pattern:/(^|[^@])(?:\b|\?)[A-Z_][\w@]*/,lookbehind:!0},operator:[/[=\/<>:]=|=[:\/]=|\+\+?|--?|[=*\/!]|\b(?:and|andalso|band|bnot|bor|bsl|bsr|bxor|div|not|or|orelse|rem|xor)\b/,{pattern:/(^|[^<])<(?!<)/,lookbehind:!0},{pattern:/(^|[^>])>(?!>)/,lookbehind:!0}],atom:/\b[a-z][\w@]*/,punctuation:/[()[\]{}:;,.#|]|<<|>>/};