TK2210-0100. v6.0.0 Plugin auto installation (no server configurations needed anymore)

[JohnXLivingston]

The livechat v6.0.0 won't need any server setup to run.
This development is already done on the develop branch.
To do so, I create a Prosody AppImage, and embed it in the plugin.
Note: in fact, there is two AppImage: one for amd64 architectures, one for arm64.

If it does not work, it is possible to fallback to the system Prosody version, as before. But this is not recommended, it is only in case of problems.
I prefer all Peertube instances to use the embeded version, to avoid version conflicts.

TODO:

• TK2210-0100 related. Prosody AppImage not working on architecture other than x86_64 #124
• add following packages in AppImage.
  • suggested: glibc-doc libc-l10n locales readline-doc.
  • Recommended: libidn2-0 libnss-nis libnss-nisplus.
  • lua-event lua-readline
  • lua-event lua-expat lua-filesystem lua-sec lua-socket
• Prosody AppImage: try to remove the build folder from the path mapping env var #125

[JohnXLivingston]

For ARM 64 support, there are open issues:

• aarch64 builds made from debian repository are not working. AppImageCrafters/appimage-builder#278
• Building from Ubuntu repository on a Debian fails AppImageCrafters/appimage-builder#279

[JohnXLivingston]

Just release a beta version.
Works only on x86_64, not arm64.
To install:

• you must be in Peertube >= 5.0.0-RC1
• use the Peertube CLI https://docs.joinpeertube.org/maintain-tools?id=installation
• node ./dist/server/tools/peertube.js plugins install --npm-name peertube-plugin-livechat --plugin-version 6.0.0-beta.1

[JohnXLivingston]

Support for ARM 64 and other CPU architectures is postponed.
I opened a new issue for that:
#124

The v6.0.0 release will contain a warning message in plugin settings to explain that the plugin is not compatible, and a link to a documentation to make it work by installing Prosody manually (as before the v6.0.0).