Add symbols in txfonts packages

[SnO2WMaN]

Is your feature request related to a problem? Please describe.
In my case, some symbols used in non-classical logic (and present in the txfonts package) are not available in KaTeX.

Describe the solution you'd like:
Add fonts in txfonts package for KaTeX

Link to or name of a (La)TeX package that provides the same feature:
txfonts

Additional context:
I tried adding the /strictif and /strictfi symbols (#3588) but the metrics are missing. Perhaps I need to add new fonts in the font generation part, but to be honest I am not familiar enough with TeX and this project to get around to it.