[Nodes UI] Invocation Component Updates

[blessedcoolant]

Cleaned up and code split the Invocation Component.

Three New Components added.

• IAINodeHeader that deals with the rendering of the Node Header
• IAINodeInputs that deals with the rendering of the Node Inputs.
• IAINodeOutputs that deals with the rendering of the Node Outputs.

Also rework the look of the Node.

• Moved outputs to the top which is where it is expected to be. Got rid of the boxing coz it's not really required. Outputs will never have params.
• Made the inputs more compact. The style work here is not done yet.
• The nodeId at the top is now a tooltip of the header title.
• Split the borders of the inputs so it feels more integrated with the sockets.

Nodes

• Nodes are now resizable.
• Nodes now spawn at the center of the screen rather than at grid's 0,0.

Debug Info

• Created a Debug Info Component
• Added temporary button to toggle Debug info on and off during development.

Add Nodes Menu

• Made it scrollable (coz I couldnt access some of the lower nodes on my screen)