Diagram for rotated surface code

[ehua7365]

Added a diagram and caption for rotated_surface.
Also corrected a minor typo in analog_stabilizer.

Modified Codes:

Rotated surface code:

• Created directory for entry
• Added a SVG figure
• Included the figure and a caption in the entry itself

Analog stabilizer code:

• Corrected a typo where the word "a set" was repeated twice.

Checklist:

I remembered to:

• Include relevant citations I could think of (with \cite{...})

• Create links to the other referenced codes (with
  \hyperref[code:...]{...})

• Update the relevant meta changelog fields with my user_id (see
  users/users_db.yml; add yourself in the PR if you aren't there already)

[phfaist]

Hi, I gotta apologize for the mysterious failing test - I finally found that it's a bug in the rendering code which uses the first paragraph of the description in various places (e.g. snippets in code lists). When it tries to render that first paragraph on its own, it encounters an unknown reference. I'm going to update the site rendering code to ignore unresolved references in those snippets.

[phfaist]

Thanks for the very pretty figure! Do you think you would be able to crop it so there is no margin on its sides? In Inkscape it's something like Document Properties -> Resize to content. Thanks!

[valbert4]

Thanks! I had to add manually but it's in there now.