chore: stop publishing broken declaration and source maps (#925)

The published tarball excludes `src` but ships `.d.ts.map`/`.js.map`
that reference `../src/*.ts`, so the maps never resolve — editors fall
back to the compiled `.d.ts`/`.js` instead of the original source.
Disabling `declarationMap`/`sourceMap` stops emitting these dead maps
and shrinks the tarball. The rsbuild browser bundle sourcemap (which
embeds its own sources) is unaffected.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>

Author: B4nan

tsconfig.json

@@ -7,7 +7,9 @@
         "moduleResolution": "Node16",
         "outDir": "dist",
         "rootDir": "src",
-        "skipLibCheck": true
+        "skipLibCheck": true,
+        "declarationMap": false,
+        "sourceMap": false
     },
     "include": ["./src/**/*"]
 }