Discuss API stability  #121

We need to discuss the current state of the API, what is likely or unlikely to change. As of March 2025, fastplotlib is in the late-alpha state.

These are mostly stable, new features may be added but breaking changes will be rare:

• PlotArea and all its subclasses. - some things may change a bit after pygfx viewports/update modes refactor
  • includes subplots and docks
• Figure, except for the toolbars - some things may change a bit after pygfx viewports/update modes refactor
• Graphics their properties
• events on graphics

Moderate to heavy change:

• Selector tools
• Axes & Legends