Pyviewer

Improvements to PannableArea:
- cleanup of internal xform handling
- more helpers, e.g. `screen_to_uv_xform`, `get_visible_box_{image,canvas}`, `get_hovered_uv_{image,canvas}`
- improved zoom behavior on MacBook trackpads
- zoom now relative to current cursor position

FloatSlider: added log scaling support

Added plotting support to single image viewer

Fix crash on window minimize

Support ignoring attributes in strict_dataclass, which enables adding custom functions etc.
Used in ParamContainer to add a hashing function.

Allow overriding to_str on enum sliders in AutoUI