Epic: Add configuration options for font rendering things (fallback, line height, ligatures, ...)

[be5invis]

### Tasks
- [x] #759
- [ ] #2664
- [x] #1298
- [ ] #5093
- [ ] #3498
- [ ] #956
- [x] #1751
- [x] #5828
- [x] #6049
- [ ] #10231

consider (backlog)

• Permit fractional 0.5 sized font scaling #6678 should we support fractional point sizes?

original content

This is a summary from #714 #455

• To properly handle box drawing characters we may need ability to explicitly set line height in pixels (to avoid rounding error). We may also need baseline position settings to avoid clipping.
• For the arrow issue, we may need the ability to support specifying a fallback sequence of fonts rather than a master font, pretty like how CSS works.
  • We may also need some method to allow WT to change how it measure characters in a fallen font?
• Option for antialiasing modes — at least for the case that the console's background isn’t transparent.

[DHowett-MSFT]

Should we should move these things into #759 and make that the master issue for font rendering options? @miniksa.

[DHowett-MSFT]

Congrats, this is now the epic for font rendering settings.

[be5invis]

I think one more interesting thing is to redefine certain characters' "width", in both rendering and cell allocation. For example, if someone is working frequently with Japanese applications, they may want box-drawing characters to become full-width.