Add Cascadia Code to font sources

[AaronFriel]

Description

This adds a new font from Microsoft, Cascadia Code.

I was unable to run the patch all the fonts script on Windows and with WSL, I think due to some issues with FontForge not shipping a Python module? 🤷‍♂

Requirements / Checklist

• Read the Contributing Guidelines
• Read or at least glanced at the FAQ
• Read or at least glanced at the Wiki
• Scripts execute without error (if necessary):
  • If any of the scripts were modified they have been tested and execute without error, e.g.:
    • ./font-patcher Inconsolata.otf --fontawesome --octicons --pomicons
    • ./gotta-patch-em-all-font-patcher\!.sh Hermit
• Extended the README and documentation if necessary, e.g. You added a new font please update the table

TODO: As I was unable to generate new patched fonts, I did not extend the readme with a broken link to a patched font.

What does this Pull Request (PR) do?

This adds the source files for Cascadia Code.

How should this be manually tested?

I ran font-patcher manually with a variety of options and verified the font renders correctly:

What are the relevant tickets (if any)?

#373

Screenshots (if appropriate or helpful)

[nogweii]

The font patcher will need to be updated to add an additional rule for this font to comply with the license https://github.com/ryanoasis/nerd-fonts/blob/master/font-patcher#L310 as Cascadia Code is a reserved font name.

[LuRsT]

Can we call it "Waterfallia Code"?

[jmickey]

Caskaydia?

[AaronFriel]

I pinged a MS program manage to see if she has a suggestion for an alternate name (there was a twitter poll with several other options) or if a license exception could be made for the nerd fonts distribution.

[nogweii]

See also the discussion in the upstream repository: microsoft/cascadia-code#10 (comment)

[rivy]

How about ...
Cascodia PF for powerline-only addition
Cascodia NF for full nerd-font treatment
?

[GhosT02101991]

src/unpatched-fonts/CascadiaCode/Cascadia.ttf

[ryanoasis]

@GhosT02101991 what does this mean?

[fabiocosta0305]

I believe that the font can be changed, but any modified font could not use the name Cascadia Code, as looks like it is MS Trademark

[ryanoasis]

Right. I guess I was confused why it was being pointed out. Yeah the name needs to be respected due to RFN

[Finii]

The patched Cascadia font has issues...

• If you patch the CascadiaCode 1910.04 the patched font is not detected as monospaced by Windows anymore, while the original is.
• This means you need to use --mono, which breaks the font because of bugs? in font-patcher: Composite glyhs like Ä U+00C4 have the added diacritics in the wrong position:

These issues (including patching the font-patcher) have been fixed at https://github.com/adam7/delugia-code
I will prepare a PR to get the script fixes here.