coral-web: use hosted fonts

[wujessica]

Description:

Re-adds Cohere fonts 🎉

AI Description

This pull request updates the font styles and families in the src/interfaces/coral_web directory.

Summary

The changes in this PR involve updating font definitions and usage in the fonts.css and cohereTheme.js files. Specifically, it introduces new @font-face rules and updates font family declarations.

Changes

• New Font Sources: The PR adds new @font-face rules in fonts.css to define the sources for the 'CohereText', 'CohereMono', 'CohereVariable', 'CohereIconDefault', and 'CohereIconOutline' fonts. These rules specify the font sources, weights, styles, and display settings.
• Updated Font Families: In cohereTheme.js, the font family declarations have been updated. The 'body' font family now includes 'CohereText', the 'variable' font family uses 'CohereVariable', and the 'code' font family includes 'CohereMono'.