Add Briem fonts

**Font Project Git Repo URL:**

- https://github.com/SorkinType/Briem-Hand
- https://github.com/SorkinType/Briem-Hand-Guides
- https://github.com/SorkinType/Briem-Print

(Possibly more families will end up as part of the project)

**Super short description of the Font Family:**

The famous icelandic type designer Briem has liberated his famous 'learn to write' fonts and Sorkin Type has been updating them to support more languages and other Google Fonts requirements, plus with help from DJR and Simon Cozens, make the joining work via OpenType shaping.

**Requirements:**

I understand that Google Fonts will publish only fonts that matches its requirements, and I can confirm the project meets them (by ticking the cases, or putting x between the square brackets in text mode):

- [x] The entire font project is licensed under the [OFL](https://scripts.sil.org/cms/scripts/page.php?site_id=nrsi&id=OFL)
- [x] There is no "Reserved Font Name" mention in the OFL license
- [x] Family name is unique according to namecheck.fontdata.com
- [x] The font supports at least [GF Latin Core glyphset](https://github.com/googlefonts/glyphsets/tree/main/GF_glyphsets/Latin/)
- [x] The repository respect the [upstream repo structure](https://googlefonts.github.io/gf-guide/upstream.html)
- [x] The source files are available in the repository
- [x] I read, agree and comply with the full [contributing requirements](https://googlefonts.github.io/gf-guide/onboarding.html)
- [x] I am the author of the font or the author agreed to this submission
- [x] I will maintain the repository

Eben is still working on the project but getting close to done, so filing this issue to track in the onboarding queue.

**Image:**