Add support for Soundcore Liberty 5 (issue #226)

[diegok]

I've been and added support for my Liberty 5, based on the existing code for p40i, and then I've been poking around the official app and testing what changed to add almost complete settings!

I still need to see how to discover toggling multipoint and there are a few bytes I was not able to map, but it seems to be working for the important parts and some of the not so useful too 🎉

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I hope this address my issue: #226

[Oppzippy]

Thanks, I had a quick look and it looks good. I'll review it within the next few days.

[Oppzippy]

It has a few issues:

• Battery level is off by one. There is one other device I know of that works like this, but it's not yet implemented in OpenSCQ30. Copying the dual battery module into a3957::modules and modifying as necessary would be acceptable here. It can be generalized and put in common in the future when there is more than one device that needs it.
• Battery level should be out of 10
• There shouldn't be an immersive experience setting
• Various missing toggles
• Sound modes are incorrect. There should be a transportation mode and there should not be adaptive noise canceling, for example.

[diegok]

It has a few issues:

* Battery level is off by one. There is [one other device I know of](https://github.com/Oppzippy/OpenSCQ30/blob/8790eb453e0dd8843d322f869b5ff42f9277b9dc/tools/soundcore-device-faker/devices/a6611.toml#L11-L12) that works like this, but it's not yet implemented in OpenSCQ30. Copying the dual battery module into `a3957::modules` and modifying as necessary would be acceptable here. It can be generalized and put in common in the future when there is more than one device that needs it.

* Battery level should be out of 10

* There shouldn't be an immersive experience setting

* Various missing toggles

* Sound modes are incorrect. There should be a transportation mode and there should not be adaptive noise canceling, for example.

Fixed and tested on the real device and all match with what I can see/toggle on the android app... I was too focused on just toggling stuff 👎

[Oppzippy]

Thanks!

[diegok]

Thank you!, I've just noted I've forgot to add my device to the readme table of supported devices. Should I send you another PR?

[Oppzippy]

No, that's alright. I'll do it when I update the changelog for the next release.