♻️ 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/semver/range.bnf

@@ -1,16 +0,0 @@
-range-set  ::= range ( logical-or range ) *
-logical-or ::= ( ' ' ) * '||' ( ' ' ) *
-range      ::= hyphen | simple ( ' ' simple ) * | ''
-hyphen     ::= partial ' - ' partial
-simple     ::= primitive | partial | tilde | caret
-primitive  ::= ( '<' | '>' | '>=' | '<=' | '=' ) partial
-partial    ::= xr ( '.' xr ( '.' xr qualifier ? )? )?
-xr         ::= 'x' | 'X' | '*' | nr
-nr         ::= '0' | [1-9] ( [0-9] ) *
-tilde      ::= '~' partial
-caret      ::= '^' partial
-qualifier  ::= ( '-' pre )? ( '+' build )?
-pre        ::= parts
-build      ::= parts
-parts      ::= part ( '.' part ) *
-part       ::= nr | [-0-9A-Za-z]+