Changes:
Fix: Now using KTOR instead of building the url by simple string concad. This fixes the https and port 443 bug that existed prier to this change. (https://example.com would look like: https://example.com:443)
Added: Support for jellyfins Base URL option. This allows the addon to be used on installations were jellyfin uses a base path.
Signed-off-by: tliese <mail@tobiasliese.me>
