Add `stim.Circuit.to_{crumble,quirk}_url` and `-svg-html` diagrams

These are variants of -svg diagrams, that force an HTML iframe in notebook viewers
- This is useful in collab notebooks because it gives a resizable tab
- Also it makes right-click + "open image in new tab" work
- Also it makes right-click + "save image" work
Adds stim.Circuit.to_crumble_url
Adds stim.Circuit.to_quirk_url
Move qasm-export from stim/circuit/ to stim/util_top/

quantumlib / Stim