Better cursor style, color, animation

[vincentfretin]

Changes that could be backported upstream:

• Change the cursor to add a cylinder similar to blink-controls by @kfarr, see kfarr@11f0c6b
• Animation on the cylinder cursor by @vincentfretin and @kfarr kfarr@c90f7aa and kfarr@2d6a072
• Add a color property to change the color of the cursor.

[vincentfretin]

Probably use blue by default like blink-controls and not purple.

[vincentfretin]

You can sponsor $20 to vincentfretin fully or partially to work on this feature. Find other work you can sponsor at https://github.com/c-frame/sponsorship

[vincentfretin]

@3DStreet sponsored me to work on this issue. Thank you!