Added File extension whitelist

Improved Vehicle Meshes docs with scale/rotation guide.

Author: gtnardy

docs/assets-modding/creating-assets/skeletal-meshes/vehicles-meshes.md

@@ -11,7 +11,11 @@ Vehicles in nanos world implement Unreal's [Wheeled Vehicle](https://docs.unreal
 
 ## Preparing a Skeletal Mesh
 
-There is no secret to import a Vehicle Skeletal Mesh. Any Skeletal Mesh with any Skeleton will work. The only "rule" is to it have 4 wheels bones, so the Vehicle systems can properly rotate them.
+There is no secret to import a Vehicle Skeletal Mesh. Any Skeletal Mesh with any Skeleton will work. Just a few rules:
+
+- It must have one bone for each Wheel, so the Vehicle Animations can properly rotate them.
+- The root bone should be rotated in the X forward, Z up format.
+- The root bone also should be ideally scaled as `1, 1, 1`.
 
 Take a look on one of the default Vehicles Skeleton:
 

docs/scripting-reference/classes/file.mdx

@@ -28,6 +28,19 @@ local configuration_file_json = JSON.parse(configuration_file:Read())
 Access to files is sandboxed. Only certain directories and files are allowed to be written or read from.
 
 
+#### Allowed Extensions
+
+Only the following file extensions are allowed to be accessed (read & write):
+
+`.txt` `.dat` `.json` `.toml` `.xml` `.csv` `.log` `.png` `.jpg` `.jpeg` `.webp` `.webm` `.mp3` `.wav` `.ogg` `.mp4`
+
+:::note
+
+If you think that a file extension should be added to the allowed list, please report it in the [Feedback Hub](https://feedback.nanos-world.com).
+
+:::
+
+
 #### Server Side
 
 On Server side, it's only allowed to access files inside the server folder itself (where server executable is located). Also, accessing the Config.toml is not allowed.