Request to consider a sans serif math font

[apoorvpotnis]

This is a request to consider an IBM Plex sans serif math font. It shall pair well with the recently released Plex serif math font. Intended uses of the sans font that I can think of are as follows.

1. Beamer presentations.
2. For use in figures. It is a very common or standard practice to use sans serif fonts for diagrams, plots and figures.
3. Section and chapter headers. Many people use sans serif fonts for headers.
4. IBM's own documents and websites. IBM uses the sans serif Plex fonts in its websites. An example would be the popular Qiskit software. Currently, the documentation site uses MathJaX, which supports only one font as of now. MathML can support a Plex sans serif font, if created. The figures in the documentation use the sans serif Plex fonts, but the typesetting isn't ideal.