Add Clara

**Font Project Git Repo URL:**

None

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

http://www.leabhair.ie/clonna-en.html has a nice "Clara" family (and others) that may be worth adding.

**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)
- [ ] There is no "Reserved Font Name" mention in the OFL license
- [ ] Family name is unique according to namecheck.fontdata.com
- [ ] The font supports at least [GF Latin Core glyphset](https://github.com/googlefonts/glyphsets/blob/main/Lib/glyphsets/encodings/GF%20Glyph%20Sets/GF-latin-core_unique-glyphs.nam)
- [ ] The repository respect the [upstream repo structure](https://github.com/googlefonts/gf-docs/tree/main/Spec#upstream-repo-structure)
- [ ] The source files are available in the repository
- [ ] I read, agree and comply with the full [contributing requirements](https://github.com/google/fonts/blob/main/CONTRIBUTING.md)
- [ ] I am the author of the font or the author agreed to this submission
- [ ] I will maintain the repository