Add initial support for Google Analytics

[deluan]

No worries, this is not for me to collect any info from users, this is to allow admins to collect info about their own server usage, if they choose to do so

To enable it, just set GATrackingID to your tracking id. You can find it in Google Analytics' console (something like UA-XXXXXXX-XX)

[Extarys]

If there is GA in there, could we implement a way to not load the google library if the user opt out?
Also, what kind of data you'd like to gather?

I'm sure you will share those information eventually, I just really don't like Google in general 😄 therefore I'm a bit concerned but I may opt-in at the beginning if it helps you then opt out later.

[deluan]

I'm not collecting any information from users, I don't even know how many copies of Navidrome are running out there.

The idea with this implementation is to allow admins to enable Google Analytics on their own installations. They can configure a GATrackingID with their own TrackingID, and this will be used by the React-GA library to send info to their own GA account, not mine!!

I added this because I'm setting up a demo instance of Navidrome, and would like some analytics for it.

[github-actions]

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