Feature Request: Enables cores to influence scaling and cropping

For some 2D cores it would useful to be able to request that their output is scaled in specific ways.
Values in the "scaleHints" object could be:

• "interpoaltion"
  -- "default": no preference
  -- "enbaled": use bilinear (or better) interpolation
  -- "disaled": use neares neighbor scaling
  -- "down": like "enabled" when source is larger than target, like "disabled" otherwise

• "imageFit"
  -- "default": no preference
  -- "contain": current non-integer behavior (respect AR, maxium size without overflow, centered)
  -- "cover": respect AR, minimumsize covering the entirescreen, centered, crop overflow (this may not have use-cases here)
  -- "stretch": fill screen exactly, ignoring aspect ratio
  -- "integerHeight"/"integerWidth": like "contain", but scale factor of height/witdh is reduced until it is integer and the one of the other dimension is adapted to keep the aspect ratio
  -- "pixelPerfect": like "integerHeight"/"integerWidth", but both scale factors are reduced to the nearest integer, ignoring aspect ratio

When both source and target have a pixel aspect ratio of 1 "integerHeight", "integerWidth" & "pixelPerfect" produce the same result.

• "crop"/"softCrop"
  -- "top", "bottom", "left", "right": Specifies an amoutnt of source pixel rows or columns to be ignored when scaling. This basicly reduces the dimension of the source from the four sides. The difference is that "crop" means the cropped edges should never be visible, even when they are on screen due to "imageFit" settings, while for "soft-crop" they should be visible in that case.

• "backgroundColor": The color used where no source is visisble, i.e. around centered sources due to "imageFit". This could be one color or multiple ones for qudrants or gradients.

This will need refining, but I tink it could be quite usefull, especially if it can be changed during runtime.

The issue does not name implementation files, tests, or entry points. Start by refining the proposed scaleHints schema and its runtime behavior for interpolation, image fitting, cropping, and background colors. Define concrete acceptance cases for each option before locating the frontend scaling and cropping code.