docs: add tsconfig aliasing to generating types docs

docs/typescript/generating-types.mdx

@@ -77,15 +77,31 @@ export interface Post {
 
 ```
 
+In order for Payload to properly infer these types when using local operations, you'll need to alias the following in your tsconfig.json file:
+
+```json
+{
+  "compilerOptions": {
+    // ...
+    "paths": {
+      "payload/generated-types": [
+        "./src/payload-types.ts", // Ensure this matches the path to your typescript outputFile
+      ],
+    }
+  },
+  // ...
+}
+```
+
 #### Customizing the output path of your generated types
 
 You can specify where you want your types to be generated by adding a property to your Payload config:
 
-```
+```ts
 {
   // the remainder of your config
 	typescript: {
-		outputFile: path.resolve(__dirname, './generated-types.ts'),
+		outputFile: path.resolve(__dirname, './payload-types.ts'),
 	},
 }
 ```