feat: Support installing Thunderstore packages

[GeckoEidechse]

• Best to have feat: Support reading mods from Northstar packages directory #417 first cause otherwise installed mods cannot be read.
• Safety check that mod is actually correctly formatted
• Uninstall older version of package if installed
• Wait for libthermite stabilisation Current version seems stable enough

Part of #415

[GeckoEidechse]

For testing I used

• Alystrasz-Parkour-0.1.1 as a mod that should pass instal
• ScureX-ModCreator-1.0.0 as a mod that should fail install

[GeckoEidechse]

Also tested updating an existing mod where a newer version is broken. It correctly didn't install new version and it kept old version.

[GeckoEidechse]

CI error is due to clippy due to libthermite marking certain functions as deprecated early. Will look into how to best address but shouldn't prevent actually testing ^^"

[Alystrasz]

Omitting missing documentation, the feature works as expected (both in installing correcly-formatted mods and preventing install badly-formatted ones) on Windows 10 and Ubuntu 23.04.