Add navbar_start configuration to conf.py (#762)

Author: svekars

docs/source/conf.py

@@ -135,6 +135,7 @@ def get_version_path():
         },
     ],
     "use_edit_page_button": True,
+    "navbar_start": ["navbar-logo"],
     "navbar_center": "navbar-nav",
     "canonical_url": "https://meta-pytorch.org/torchforge/",
     "header_links_before_dropdown": 7,