Inline value polish (viewport truncation + hover)

[Yoyokrazy]

Right now inline values in both the debugger and notebook cell execution have a truncation cutoff of 150 characters, and then are replaced with an ellipses. Thinking about looking into using the viewport size to do this (maybe see word wrap code?).

However, if we truncate more aggressively that will potentially just lead to data loss for longer values (dataframes could get hit by this overly hard) and ideally there could be a hover contributed to these decorations.

cc/ @connor4312