Create Pixar's documentation tutorials (first 7) using Shift_USD

[hectorjimenezinbibo]

For the Shift version release v1, we need to add the documentation for the 7 first examples from the Pixar's Tutorials webpage: https://openusd.org/release/tut_usd_tutorials.html

For the documentation page tutorials, we will need to explain and add an screenshot showing the board for each one of the steps needed to complete the tutorial.

Pixar's Tutorials

1. Hello World - Creating Your First USD Stage
2. Hello World Redux - Using Generic Prims
3. Inspecting and Authoring Properties
4. Referencing Layers
5. Converting Between Layer Formats
6. Traversing a Stage
7. Authoring Variants

Definition of Done (Workflows)

• [x] Create workflow for tutorial 1 & 2
• [x] Create workflow for tutorial 3
• [x] Create workflow/s for tutorial 4
• [x] Create workflow/s for tutorial 5
• [x] Create workflow/s for tutorial 6
• [x] Create workflow/s for tutorial 7

Definition of Done (Documentation Page)

• [x] Add link in main USD documentation page for the USD tutorials
• [x] Create documentation page for tutorial 1 & 2
• [x] Create documentation page for tutorial 3
• [x] Create documentation page for tutorial 4
• [x] Create documentation page for tutorial 5
• [x] Create documentation page for tutorial 6
• [x] Create documentation page for tutorial 7