create #client types alias (#10695)

Co-authored-by: Rich Harris <rich.harris@vercel.com>

packages/svelte/tsconfig.json

@@ -24,7 +24,8 @@
 			"svelte/motion": ["./src/motion/public.d.ts"],
 			"svelte/server": ["./src/server/index.js"],
 			"svelte/store": ["./src/store/public.d.ts"],
-			"#compiler": ["./src/compiler/types/index.d.ts"]
+			"#compiler": ["./src/compiler/types/index.d.ts"],
+			"#client": ["./src/internal/client/types.d.ts"]
 		}
 	},
 	"include": [