Support custom provider modifiers in interface

[nathanchase]

The change in v2.0.0-alpha.1 to src/types/image.ts caused any modifiers that any of the custom providers offer (including ipx) for things like "sharpen" or "grayscale".

IPX alone has many modifiers:

export interface IPXModifiers extends Omit<ImageModifiers, 'fit' | 'format' | 'blur'> {
  format: 'jpeg' | 'jpg' | 'png' | 'webp' | 'avif' | 'gif' | 'heif' | 'tiff' | 'auto' | string & {}
  fit: 'contain' | 'cover' | 'fill' | 'inside' | 'outside' | string & {}
  resize: string
  quality: number | string
  background: string
  position: string
  enlarge: true | 'true'
  kernel: 'nearest' | 'cubic' | 'mitchell' | 'lanczos2' | 'lanczos3' | string & {}
  trim: number | string
  extend: string
  extract: string
  rotate: number | string
  flip: true | 'true'
  flop: true | 'true'
  sharpen: number | string
  median: number | string
  blur: number | string
  flatten: true | 'true'
  gamma: string
  negate: true | 'true'
  normalize: true | 'true'
  threshold: number | string
  modulate: string
  tint: number | string
  grayscale: true | 'true'
  animated: true | 'true'
}

but if you were to try to use any of these modifiers with the useImage() composable, the typing does not exist for them.

Now, I'm not sure if this is a limitation of the existing typing, or something not hooked up for useImage() specifically to be able to have typing for all of the modifiers of all the various providers.