add scripts for pytorch3d install

scripts/install_pytorch3d.py

@@ -0,0 +1,12 @@
+import sys
+import torch
+import subprocess
+
+pyt_version_str=torch.__version__.split("+")[0].replace(".", "")
+version_str="".join([
+    f"py3{sys.version_info.minor}_cu",
+    torch.version.cuda.replace(".",""),
+    f"_pyt{pyt_version_str}"
+])
+subprocess.run(["pip", "install", "fvcore", "iopath"])
+subprocess.run(["pip", "install", f"--no-index", f"--no-cache-dir", f"pytorch3d", f"-f", f"https://dl.fbaipublicfiles.com/pytorch3d/packaging/wheels/{version_str}/download.html"])