Add new type of values for scales and dimensions

[lfoppiano]

We need to add two new types in the value parser:

• 1:1000 should not be resolved nor normalised, but we should recognise that is not a plain quantity
• 1x2x4 should be treated as dimensions and parsed in a special format to be added in the value parser

Originally posted by @lfoppiano in https://github.com/lfoppiano/grobid-quantities/issues/111#issuecomment-1965590631