Setup website with docusaurus (#11)

Summary:
Set up landing page, docs page, and html versions of the ipython notebook tutorials.
Pull Request resolved: https://github.com/fairinternal/pytorch3d/pull/11

Reviewed By: gkioxari

Differential Revision: D19730380

Pulled By: nikhilaravi

fbshipit-source-id: 5df8d3f2ac2f8dce4d51f5d14fc336508c2fd0ea

website/tutorials.json

@@ -0,0 +1,20 @@
+{
+  "3D operators": [
+     {
+      "id": "deform_source_mesh_to_target_mesh",
+      "title": "Fit Mesh"
+     },{
+      "id": "bundle_adjustment",
+      "title": "Bundle Adjustment"
+     }
+  ],
+  "Rendering": [
+     {
+      "id": "render_textured_meshes",
+      "title": "Render Textured Meshes"
+     }, {
+      "id": "camera_position_optimization_with_differentiable_rendering",
+      "title": "Camera Position Optimization"         
+     }
+  ]
+}