Swap to using Inter fonts

[cigamit]

This brings us more in line with other CIQ applications, and moves away from the RH fonts.

[Copilot]

Pull request overview

This PR updates AWX’s UI typography to use the Inter font family instead of the prior Red Hat/Open Sans font setup, aligning the UI styling with other CIQ applications.

Changes:

• Switch global UI font-family to Inter and adjust some Patternfly title styling overrides.
• Update the “installing” (migration) page to reference Inter font assets.
• Update custom error page CSS to use Inter .woff2 fonts (and add Inter font assets under awx/static).

Reviewed changes

Copilot reviewed 3 out of 19 changed files in this pull request and generated 4 comments.

File	Description
awx/ui/src/ascender.css	Introduces Inter @font-face and applies Inter to body/Patternfly titles.
awx/ui/public/installing.html	Updates font references on the installing/migration page.
awx/static/Inter-Regular.woff2	Adds Inter Regular font asset for server-rendered/static pages.
awx/static/custom_error.css	Switches custom error pages from Red Hat TTF fonts to Inter WOFF2 fonts.

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[Klaas-]

do you need to add a license of the font to the repo?

https://github.com/rsms/inter/blob/master/LICENSE.txt maybe?

[cigamit]

Added. I had to add a separate folder for it, as the tests fail if we chunk it in the UI, as its not an npm module.