Typecheck on the native compiler, keep 6 for the tools

typescript 7.0.2 is the native compiler and exports no JavaScript API. next 16.0.1
does not recognize it as installed and runs an unsolicited `pnpm add -D typescript`
mid-build, so a bare 7 pin is out: 7.0.2 comes in aliased as tsgo and does the
typechecking while typescript stays on the 6 line, which next reads cleanly. docs/
reports the same 4 diagnostics under both compilers, once the two side-effect CSS
imports get the ambient declarations TS7 now demands. The lockfile is new; the
package already declared pnpm, and npm cannot resolve fumadocs-mdx against next 16.

Co-authored-by: Hanzo Dev <[email protected]>

docs/global.d.ts

@@ -0,0 +1,2 @@
+declare module '*.css';
+declare module '@hanzo/font/css';

docs/package.json

@@ -8,6 +8,7 @@
     "export": "TURBOPACK=0 next build",
     "start": "next start",
     "lint": "next lint",
+    "typecheck": "node_modules/tsgo/bin/tsc --noEmit --incremental false",
     "postinstall": "fumadocs-mdx"
   },
   "dependencies": {
@@ -31,7 +32,8 @@
     "postcss": "^8.4.49",
     "rehype-pretty-code": "^0.14.1",
     "shiki": "^1.27.2",
-    "typescript": "^5.7.2"
+    "tsgo": "npm:[email protected]",
+    "typescript": "6.0.3"
   },
   "packageManager": "[email protected]"
 }