Add fit to node canvas util

[ghsteff]

PR Checklist

Please check if your PR fulfills the following requirements:

• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

PR Type

What kind of change does this PR introduce?

[ ] Bugfix
[x] Feature
[ ] Code style update (formatting, local variables)
[ ] Refactoring (no functional changes, no api changes)
[ ] Build related changes
[ ] CI related changes
[ ] Documentation content changes
[ ] Other... Please describe:

What is the current behavior?

There's no way to fit / focus the view on a specific node, only on the entire canvas

What is the new behavior?

use fitToNode() from CanvasRef to zoom and center the viewport on a specific node

Does this PR introduce a breaking change?

[ ] Yes
[x] No

Other information

Screen.Recording.2024-07-08.at.4.18.39.PM.mov

Screen.Recording.2024-07-08.at.4.13.22.PM.mov

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[amcdnl]

I would add some comments here.

[amcdnl]

looks great - one minor tweak to api and its good to go