Allow closing tags to take arguments for linear transitions

[tinkerer-red]

Some notable options would be color, alpha, and scale. Ideally when presented with the following input "[c, FF0000]This is an example[/c, 0026FF]" this would declare that the start of the segment should be red, and the end of the segment should be blue. which would resemble something a bit like this.

this may not be a perfect depiction of it, as the implementation would likely be per glyph instead of per pixel, but that would be an acceptable compromise here. This is merely intended for use with scale, and maybe alpha to help assist in exaggerating intent of a character's dialog, for instance scale would allow for showing they are getting louder or quieter, where as alpha could be used to show their words are stammering off or being interjected in the event two dialog boxes are shown at once using typist.