Add Inter Display #7115

I understand upgrading to Inter 4 is proving to be difficult as seen in Issue #3429 but can we add Inter Display as a separate font meanwhile? The creator @rsms calls it a subfamily.

Figma's font selector shows both fonts as a separate font (I've downloaded the latest v4 from the creator's Github.)

Font Project Git Repo URL: https://github.com/rsms/inter

Super short description of the Font Family: A new “display" variant of Inter. https://rsms.me/inter/lab/?family=display

Requirements:

Google Fonts will publish only fonts that match its requirements. Please familiarize yourself with the complete documentation in the Google Fonts Guide (GF-Guide) and ensure your font project complies with them before submitting the font family. You can also use the Google Fonts Project Template, which will help you create a repository that follows the needed structure and includes build 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):

• I read, agree, and comply with the full contributing requirements
• The entire font project is licensed under the 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
• The repository respect the upstream repo structure
• The source files are available in the repository
• I am the author of the font, or the author agreed to this submission
• I will maintain the repository and participate in the onboarding process (addressing, solving, and responding to issues, merging pull requests, etc)

Image:
rsms/inter#463