Create user guide

[Misty-W]

Add user guide for UCC covering

• Intro
• Installation
• Basic usage
• Key modules
• Customization
  • Settings
  • Writing a custom pass
  • Adding a pass to the UCC transpilation sequence
• Terminology clarification

[jordandsullivan]

Just checking, it looks like we would need to install the myst-parser in order to use .md files with sphinx. Do we want to jump in on this dependency or hold off?

[Misty-W]

Just checking, it looks like we would need to install the myst-parser in order to use .md files with sphinx. Do we want to jump in on this dependency or hold off?

Good catch, I converted the user guide to .rst.

[jordandsullivan]

LGTM. Do we also want to add the individual pass modules to the API guide do you think?

[Misty-W]

LGTM. Do we also want to add the individual pass modules to the API guide do you think?

thanks Jordan! Yes, I've added them.