quickstart updates + (other nits+links added to repo) (#633)

* small changes

* rewrite quickstart + readme

* fixed all licensing headers

* nits

docs/quickstart/first_nerf.md

@@ -68,6 +68,8 @@ Please note, this quickstart allows you to preform everything in a headless mann
 ## FAQ
 
 - [TinyCUDA installation errors out with cuda mismatch](tiny-cuda-error)
+- [Installation errors, File "setup.py" not found](pip-install-error)
+- [Runtime errors, "len(sources) > 0".](cuda-sources-error)
 
 (tiny-cuda-error)=
 
@@ -81,8 +83,6 @@ While installing tiny-cuda, you run into: `The detected CUDA version mismatches
 pip install torch==1.12.1+cu113 torchvision==0.13.1+cu113 -f https://download.pytorch.org/whl/torch_stable.html
 ```
 
-- [Installation errors, File "setup.py" not found](pip-install-error)
-
 (pip-install-error)=
 
 #### Installation errors, File "setup.py" not found
@@ -96,7 +96,6 @@ This can be fixed by upgrading pip to the latest version:
 python -m pip install --upgrade pip
 ```
 
-- [Runtime errors, "len(sources) > 0".](cuda-sources-error)
 
 (cuda-sources-error)=