Update remote browsing of Studio

[rtibbles]

Summary

• Consolidates logic for checking Studio availability into the useDevices composable
• Removes special casing for Studio and defers to using the baseurl GET parameter to fetch channels
• Does a version check against Studio and all Kolibri devices to make sure they support remote content browsing
• Adds navigation guards for the explore libraries page
• Fixes some issues in the remote API logic that failed to properly raise errors
• Fixes issue in the remote API logic that could cause Brotli encoded responses that the server cannot decode

References

Fixes #10280

Reviewer guidance

Run the dev server with this environment variable set:

KOLIBRI_CENTRAL_CONTENT_BASE_URL=https://unstable.studio.learningequality.org

Complete and proper functioning is dependent on this PR being merged: learningequality/studio#4018

This PR is now merged, and unstable should be updated automatically.

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Testing checklist

• Contributor has fully tested the PR manually
• If there are any front-end changes, before/after screenshots are included
• Critical user journeys are covered by Gherkin stories
• Critical and brittle code paths are covered by unit tests

PR process

• PR has the correct target branch and milestone
• PR has 'needs review' or 'work-in-progress' label
• If PR is ready for review, a reviewer has been added. (Don't use 'Assignees')
• If this is an important user-facing change, PR or related issue has a 'changelog' label
• If this includes an internal dependency change, a link to the diff is provided

Reviewer checklist

• Automated test coverage is satisfactory
• PR is fully functional
• PR has been tested for accessibility regressions
• External dependency files were updated if necessary (yarn and pip)
• Documentation is updated
• Contributor is in AUTHORS.md

[github-actions]

Build Artifacts

Asset type	Download link
PEX file	kolibri-0.16.0a12.dev0_git.54.gd29a9ceb.pex
Windows Installer (EXE)	kolibri-0.16.0a12.dev0+git.54.gd29a9ceb-unsigned.exe
Debian Package	kolibri_0.16.0a12.dev0+git.54.gd29a9ceb-0ubuntu1_all.deb
Mac Installer (DMG)	kolibri-0.16.0a12.dev0+git.54.gd29a9ceb-0.3.0.dmg
Source Tarball	kolibri-0.16.0a12.dev0+git.54.gd29a9ceb.tar.gz
WHL file	kolibri-0.16.0a12.dev0+git.54.gd29a9ceb-py2.py3-none-any.whl

[akolson]

Thanks @rtibbles. These look like acceptable changes to me. Any other tweaks will be made with #10448