fix(react-start-rsc): re-export renderable types from public entries

.changeset/eight-dingos-occur.md

@@ -0,0 +1,5 @@
+---
+'@tanstack/react-start-rsc': patch
+---
+
+Re-export `RenderableServerComponent`, `RenderableServerComponentAttributes`, `RenderableServerComponentBuilder`, and `AnyRenderableServerComponent` from the package's public entries. Without these, consumers with `declaration: true` hit TS2742 on `renderServerComponent` calls and are forced to annotate handlers as `Promise<any>`.

packages/react-start-rsc/src/index.rsc.ts

@@ -2,7 +2,13 @@
 // This file is used when importing from RSC (React Server Components) context
 
 // Types are always available
-export type { AnyCompositeComponent } from './ServerComponentTypes'
+export type {
+  AnyCompositeComponent,
+  AnyRenderableServerComponent,
+  RenderableServerComponent,
+  RenderableServerComponentAttributes,
+  RenderableServerComponentBuilder,
+} from './ServerComponentTypes'
 
 // New API: renderServerComponent - renders element to renderable proxy
 export { renderServerComponent } from './renderServerComponent.js'

packages/react-start-rsc/src/index.ts

@@ -2,7 +2,13 @@
 // This file is used when importing outside of RSC (React Server Components) context
 
 // Types are always available
-export type { AnyCompositeComponent } from './ServerComponentTypes'
+export type {
+  AnyCompositeComponent,
+  AnyRenderableServerComponent,
+  RenderableServerComponent,
+  RenderableServerComponentAttributes,
+  RenderableServerComponentBuilder,
+} from './ServerComponentTypes'
 
 // CSS hrefs symbol for type-safe access
 export { SERVER_COMPONENT_CSS_HREFS } from './ServerComponentTypes'