fix shaped grid positioning and circle innerBox/sizing

[gavin-ts]

Summary

Fixes grid positioning of contents when the grid is a shape with a custom innerBox.
Also fixes the circle shape sometimes actually being too small to fit its content in its innerBox.

Details

• fixes grid container with shape circle doesn't position cells correctly #1733
• updates circle sizing calculations so it will always fit the content within the circle's innerBox
• grid contents are now repositioned correctly according to the shape's innerBox
• updates commented code to render shape's innerBox in d2svg
• added TODO fix cloud innerBox sometimes being the wrong one fix cloud shape innerBox selection #1735

before/after

before/after with innerBoxes highlighted

e2ereport

[alixander]

is this right? why's it look off?

[gavin-ts]

is this right? why's it look off?

this is how this test tries to replicate in #1674 . I think the label dimensions of the character used aren't exactly square/centered

Here is the character highlighted on master:

Here is it now (correctly fits inside innerbox):