feat: Adapt PyMAPDL to common plotter

[AlejandroFernandezLuces]

Overview

This PR adapts PyMAPDL to the usage of the common PyAnsys plotter. It seems that part of PyMAPDL plotter is in another repo, so this work is partially done until I figure out how to modify this other part.

As a side effect, this implementation won't allow pyvista subplotting.

To summarize, on top of improving maintainability by keeping some common plotting code in the same location, this adds the following features:

• Change view buttons
• Displacement buttons
• Ruler widget to measure distances in the plotter
• Measure box widget
• Option to filter the meshes by a regex
• Option to add custom buttons to the plotter

Screenshot of how the plotter looks now:

Missing:

• Document and add comments where needed
• Adapt picker to use common plotter picker
• Adapt the other part of PyMAPDL

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[germa89]

I think this is great. I left some minor comments. Thank you @AlejandroFernandezLuces !!

[AlejandroFernandezLuces]

Not sure how to force the bot to rename the changelog file, I can't do it manually, do you know how @clatapie?

[AlejandroFernandezLuces]

Since this is a big change, I'll wait a bit more before merging just in case anyone has any more feedback. Thanks @germa89 @clatapie @PipKat for your feedback 🚀

[clatapie]

Great PR, I am happy to see it within PyMAPDL!

[AlejandroFernandezLuces]

Merging, thanks everyone again 😄