Wrong and missing definitions for custom node appearance

[altarfinch]

@sha-N, I noticed some wrong definitions:

    onDrawBackground?(
        canvas: HTMLCanvasElement,
        ctx: CanvasRenderingContext2D
    ): void;
    onDrawForeground?(
        canvas: HTMLCanvasElement,
        ctx: CanvasRenderingContext2D
    ): void;

I believe the arguments are swapped, it should be:

    onDrawBackground?(
        ctx: CanvasRenderingContext2D,
        canvas: HTMLCanvasElement
    ): void;
    onDrawForeground?(
        ctx: CanvasRenderingContext2D,
        canvas: HTMLCanvasElement
    ): void;

Also, if one wants to reproduce the custom node appearance sample in TS, the definition for LGraphNode.flags.collapsed is missing.