Set Corner Type and Set Caps Nodes

Grease pencil points can have one of three corner types:

• Round
• Flat
• Sharp

Also, stroke caps can either be rounded, or flat.

However, corner types cannot be changed through geometry nodes, and caps do not have a dedicated "set" node.

I propose there be

• Grease Pencil Corner Type
• Grease Pencil Cap Type

to read these properties, and also

• Set Grease Pencil Corner Type
• Set Grease Pencil Cap Type

to write these properties.