fix(types): Update tsup configuration to conditionally generate declarations based on watch mode (#6683)

Author: nikosdouvlis

.changeset/green-dingos-flow.md

@@ -0,0 +1,2 @@
+---
+---

packages/types/tsup.config.ts

@@ -1,15 +1,16 @@
 import { defineConfig } from 'tsup';
 
-export default defineConfig(() => {
+export default defineConfig(overrideOptions => {
   return {
     entry: {
       index: 'src/index.ts',
     },
+    onSuccess: overrideOptions.watch ? 'pnpm build:declarations' : undefined,
     minify: false,
     clean: true,
     sourcemap: true,
     format: ['cjs', 'esm'],
     legacyOutput: true,
-    dts: true,
+    dts: !overrideOptions.watch,
   };
 });