Mod download UI integration

[Alystrasz]

NorthstarMods counterpart of R2Northstar/NorthstarLauncher#595

For any comments unrelated to this mods PR, please post on the launcher PR (to keep all discussions on one page).

Changes

• Adds an option in the Commands menu to enable mod downloading, this is meant to easily allow players to test the feature;
• DownloadMod function triggers mod downloading, and displays progress in an alert dialog;
• If some mods have been downloaded, reload mods.

TODOs

• Add English translations
• Activate remote mod if it's required by a server and already downloaded, but not activated (remote mods are enabled by default by current mod system)
• Expose a test server running a custom map endlessly

[Alystrasz]

I believe the compile check does not pass due to updated nativefuncs.json

[ASpoonPlaysGames]

I believe the compile check does not pass due to updated nativefuncs.json

Looks like you added your new native funcs to the SERVER section of nativefuncs.json instead of UI

[Alystrasz]

I believe the compile check does not pass due to updated nativefuncs.json

Looks like you added your new native funcs to the SERVER section of nativefuncs.json instead of UI

Good catch, thanks!

[GeckoEidechse]

Regarding:

• Adds an option in the Commands menu to enable mod downloading, this is meant to easily allow players to test the feature;

I'm not sure if I already mentioned this in our discussion. Basically I would make the barrier to enabling it a bit more difficult then a switch in settings. Personally tending towards a CLI arg rn. The main reason is that, we don't want too many players start using it before we feel it's ready. Auto-mod-download is a huge feature in terms of impact on Northstar so we want to make it "splash" when we release it. Think hype-up trailer and everything. And that also requires having some content for it.
If however majority of players already start enabling it right now where there's basically no content for it yet, the sudden impact on global enable is a lot smaller and as such has less of an effect...

[GeckoEidechse]

Alternative to CLI arg would be setting a convar value manually or having a mod on Thunderstore that flips the switch to enable the feature.

Basically something a tad less accessible for players while we are still fleshing out the functionality and content ^^

[ASpoonPlaysGames]

Formatting mostly

[ASpoonPlaysGames]

Code looks good to me