fix: write conversions

[zavinator]

• fix: colorspace name something like "default (linear)"
• fix: missing promoted knobs after conversion to nuke writes and then back to sg writes (set node name after createNode)
• improvement: createNode with inpanel=False (most users won't to open all created nodes in the panel)
• fix: create write under root (same as wwfxuk:fix-incorrect-writenode-context, Fix handler creates write under root #35)