Add Sector

**Font Project Git Repo URL: https://github.com/atelieramb/Sector_Mono**

**Super short description of the Font Family: Sector is a display monospaced typeface inspired by teletext 1980s fonts and OCR-A. Sector was originally created for an art installation in Amsterdam in 2020.**

**Requirements:**

By filling this issue, you can confirm the project meets the requirements (by ticking the cases or putting x between the square brackets in text mode):

- [X] I read, agree, and comply with the full [contributing requirements](https://googlefonts.github.io/gf-guide/index#pre-production-getting-your-fonts-ready-for-gf)
- [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](https://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 am the author of the font, or the author agreed to this submission
- [X] I will maintain the repository and participate in the onboarding process (addressing, solving, and responding to issues, merging pull requests, etc)

**Image:**