docs: include available objects in documentation

docs/docs/configuration/objects.mdx

@@ -0,0 +1,36 @@
+---
+id: objects
+title: Default available objects
+sidebar_label: Available objects
+---
+
+import labels from '../../../labelmap.txt';
+
+By default, Frigate includes the following object models from the Google Coral test data.
+
+<ul>
+  {labels.split('\n').map((label) => (
+    <li>{label.replace(/^\d+\s+/, '')}</li>
+  ))}
+</ul>
+
+## Custom Models
+
+Models for both CPU and EdgeTPU (Coral) are bundled in the image. You can use your own models with volume mounts:
+
+- CPU Model: `/cpu_model.tflite`
+- EdgeTPU Model: `/edgetpu_model.tflite`
+- Labels: `/labelmap.txt`
+
+You also need to update the model width/height in the config if they differ from the defaults.
+
+### Customizing the Labelmap
+
+The labelmap can be customized to your needs. A common reason to do this is to combine multiple object types that are easily confused when you don't need to be as granular such as car/truck. You must retain the same number of labels, but you can change the names. To change:
+
+- Download the [COCO labelmap](https://dl.google.com/coral/canned_models/coco_labels.txt)
+- Modify the label names as desired. For example, change `7 truck` to `7 car`
+- Mount the new file at `/labelmap.txt` in the container with an additional volume
+  ```
+  -v ./config/labelmap.txt:/labelmap.txt
+  ```