feat: DW Openpose Processor

[blessedcoolant]

What type of PR is this? (check all applicable)

• Feature

Have you discussed this change with the InvokeAI team?

• Yes

Have you updated all relevant documentation?

• No

Description

This PR adds the DW Openpose Image Processor for ControlNet to InvokeAI.

• Added a new node: DW Openpose Image Processor - This node takes in an image and lets you generate an openpose skeleton from it. You are able to generate the body skeleton, hand skeleton and also the facial landmarks selectively.
• DW Openpose Processor has been implemented in the Linear UI. It is also now the default processor for Openpose.

Removed

The old Openpose Image Processor has been entirely removed. Any current workflow using this node will break. But the fix is simple. Just replace it with the new DW Openpose Image Processor and you are good to go.

After Merge

• Update the docs to reflect this change

[psychedelicious]

Looks good just would like to have types on our code, and attribution for code that was copied

[Millu]

Should we default the processor to hands as well?

[hipsterusername]

works for me. have we had a test on mac?

[blessedcoolant]

@Millu Millun, could you update (or point out to me) the docs that need to reflect the fact that the Openpose Image Processor is now removed entirely and the new way to do Openpose is with the DW Openpose Processor and that this will break older workflows that use the other processor.

[Millu]

Updated docs & tested on macOS

[blessedcoolant]

@hipsterusername Good to merge I think.

[Millu]

Let's hold to merge until 3.6.3 is released as this will introduce a breaking change