chore: don't distribute unused types definitions (#15473)

hopefully helps with #15182, also makes the package smaller

---------

Co-authored-by: Simon H <5968653+dummdidumm@users.noreply.github.com>

.changeset/hungry-dancers-tap.md

@@ -0,0 +1,5 @@
+---
+'svelte': patch
+---
+
+chore: don't distribute unused types definitions

packages/svelte/package.json

@@ -9,11 +9,12 @@
     "node": ">=18"
   },
   "files": [
+    "*.d.ts",
     "src",
     "!src/**/*.test.*",
+    "!src/**/*.d.ts",
     "types",
     "compiler",
-    "*.d.ts",
     "README.md"
   ],
   "module": "src/index-client.js",