Support multiple mod versions

Currently, Northstar does not support multiple mod versions, *i.e.* a single mod being installed several times with different versions. In the Northstar repositories, [launcher](https://github.com/R2Northstar/NorthstarLauncher/pull/828) and [mods](https://github.com/R2Northstar/NorthstarMods/pull/903) pull requests have been opened to fix this issue; however, they change the `enabledmods.json` file format: #### From ```json { "Northstar.Client": true, "Northstar.Coop": true, "Northstar.CustomServers": true, "Northstar.Custom": true, "MRVN Shake It": true, "Titan Payload": false, "Parkour": true } ``` #### To ```json { "Version": 1, "Northstar.Client": { "1.19.0": true }, "Northstar.Coop": { "0.0.0": true }, "Northstar.CustomServers": { "1.19.0": true }, "Northstar.Custom": { "1.19.0": false }, "Parkour": { "0.1.2": false, "0.2.1": true }, "MRVN Shake It": { "0.0.1": true }, "Titan Payload": { "1.2.0": false } } ``` It would be great if Viper had the capacity to adapt to this new `enabledmods.json` format.