Save instance in url route

[mykhailodanilenko]

🚀 Description

This PR introduces working with instance as a url parameter. Currently, the structure is like this: [baseURL]/[instance]/video?id=[video uuid]/ Unfortunately, the whole functionality won't work on GitHub pages deployment anyhow, either if we choose static or SPA export output. read more. As a hacky fallback, we can pre-render all video pages for all listed instances, but it's questionable if it is strictly necessary.

📄 Motivation and Context

67

🧪 How Has This Been Tested?

on web - desktop + mobile, on Expo Go - ios & android, didn't test deeplinking as we haven't configured any mobile platforms yet

📦 Types of changes

• [ ] Bug fix (non-breaking change which fixes an issue)
• [x] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)

✅ Checklist (copied from README)

• [x] Squash your changes into a single clear and thoroughly descriptive commit, split changes into multiple commits only when it contributes to readability
• [x] Reference the GitHub issue that you are contributing on in your commit title or body
• [x] Sign your commits, as this is required by the automated GitHub PR checks
• [x] Ensure that the changes adhere to the project code style and formatting rules by running npx eslint . and npx prettier --check ../ from the ./OwnTube.tv/ directory (without errors/warnings)
• [x] Include links and illustrations in your pull request to make it easy to review
• [x] Request a review by @ar9708, @OGTor, @tryklick and @mblomdahl

[ar9708]

@mykhailodanilenko I see you're still pushing changes here, so I put it in "draft mode". Please mark it as ready-for-review when you're satisfied.

[mykhailodanilenko]

closed in favor of #77