Small fix for Redgifs embedded media

[net00-1]

Is your feature request related to a problem? Please describe.

• Many Redgifs uploads are done using the v3.redgifs.com subdomain. Voyager treats these links as regular link posts instead of embedding the media. For example https://lemmynsfw.com/post/12153533 (NSFW)

Describe the solution you'd like

• Redgifs link detection seems to be done in src/features/media/external/redgifs/helpers.ts with regex:

  • ^https:\/\/(?:www\.)?redgifs.com\/watch\/([a-z]+)

• I added v3 subdomain like so https:\/\/(?:www\.|v3\.)?redgifs.com\/watch\/([a-z]+) within my fork. After building the app for iOS I see that links with v3 subdomain are now properly embedded as well. I tested this with iPad and iPhone on iOS 17.5.1

Describe alternatives you've considered

• N/A

Additional context

• My fork https://github.com/net00-1/voyager (built in codemagic.io, please ignore codemagic.yaml)