REL: v3.5.0

Highlights of this release include:

- Figure and Axes creation / management
    - subplot_mosaic supports simple Axes sharing
    - Figure now has draw_without_rendering method
    - Figure __init__ passes keyword arguments through to set
- Plotting methods
    - Add Annulus patch
    - set_data method for FancyArrow patch
    - New arrow styles in ArrowStyle and ConnectionPatch
    - Setting collection offset transform after initialization
- Colors and colormaps
    - Colormap registry (experimental)
    - Image interpolation now possible at RGBA stage
    - imshow supports half-float arrays
    - A callback registry has been added to Normalize objects
- Titles, ticks, and labels
    - Settings tick positions and labels simultaneously in set_ticks
- Fonts and Text
    - Triple and quadruple dot mathtext accents
    - Font properties of legend title are configurable
    - Text and TextBox parse_math option
    - Text can be positioned inside TextBox widget
    - Simplified font setting for usetex mode
    - Type 42 subsetting is now enabled for PDF/PS backends
- rcParams improvements
    - Allow setting default legend labelcolor globally
- 3D Axes improvements
    - Axes3D now allows manual control of draw order
    - Allow changing the vertical axis in 3d plots
    - plot_surface supports masked arrays and NaNs
    - 3D plotting methods support data keyword argument
- Interactive tool improvements
    - Colorbars now have pan and zoom functionality
    - Updated appearance of Slider widgets
    - Selector additions of clearing, dragging, and removal
    - CallbackRegistry objects gain a method to temporarily block signals
    - Directional sizing cursors
- Sphinx extensions
    - More configuration of mathmpl sphinx extension
- Backend-specific improvements
    - New GTK4 backend
    - New Qt6 backend
    - HiDPI support in Cairo-based, GTK, and Tk backends
    - Qt figure options editor improvements
    - WX backends support mouse navigation buttons
    - WebAgg uses asyncio instead of Tornado