Expose minimal asset cache API.

PiperOrigin-RevId: 803126923
Change-Id: Iabf63802572f7cb86864b5ece85f44b3f15a4ec0

doc/APIreference/functions.rst

@@ -1289,6 +1289,12 @@ Add file to VFS. The directory argument is optional and can be NULL or empty. Re
 
 *Nullable:* ``directory``
 
+
+.. Assetcache:
+
+The asset cache is a mechanism for caching assets (e.g. textures, meshes, etc.) to avoid repeated slow recompilation.
+The following methods provide way to control the capacity of the cache or to disable it altogether.
+
 .. _mj_addBufferVFS:
 
 `mj_addBufferVFS <#mj_addBufferVFS>`__

doc/APIreference/functions_override.rst

@@ -25,6 +25,12 @@ Add file to VFS. The directory argument is optional and can be NULL or empty. Re
 
 *Nullable:* ``directory``
 
+
+.. Assetcache:
+
+The asset cache is a mechanism for caching assets (e.g. textures, meshes, etc.) to avoid repeated slow recompilation.
+The following methods provide way to control the capacity of the cache or to disable it altogether.
+
 .. _Parseandcompile:
 
 The key function here is :ref:`mj_loadXML`. It invokes the built-in parser and compiler, and either returns a pointer to