Bump remix to 1.9.0

[TrySound]

• https://github.com/remix-run/remix/releases/tag/remix%401.8.0
• https://github.com/remix-run/remix/releases/tag/remix%401.9.0

Build issue still not fixed (#725)

Code Review

• hi @kof, I need you to do
  • test it on preview

Before requesting a review

• made a self-review
• added inline comments where things may be not obvious (the "why", not "what")

Before merging

• tested locally and on preview environment (preview dev login: 5de6)
• updated test cases document
• added tests
• if any new env variables are added, added them to .env.example and the designer/env-check.js if mandatory

[vercel]

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Name	Status	Preview	Updated
webstudio-designer	✅ Ready (Inspect)	Visit Preview	Jan 5, 2023 at 10:33AM (UTC)

[kof]

did basic testing