Ability to set max export resolution for textures

[optimus007]

Is your feature request related to a problem? Please describe.
Just baked a model with a 4k textures and wanted a 1k GLB for hosting online , then realised I'll have to downscale each pbr texture and reload it in new blender file then export

Describe the solution you'd like
if there was a drop-down with max resolution with power of 2 sizes as options it will come in handy for quickly making quality iterations

Additional context
Since there is already ability for merging metal,roughness,AO and ability to change image format, I thought this would be a good feature to have

[lowpolycosmonaut]

This would be an excellent feature, especially given the max texture limits for iOS devices and general file optimization needs for loading models fast over the web.