Migrate newpipe.error to Kotlin

[Profpatsch]

An experiment in how much effort it is to migrate classes to kotlin.

It took me about 30–60 minutes (minus getting to know some kotlin features) to migrate these, try the result and fix all warnings that popped up.

What is it?

• [ ] Bugfix (user facing)
• [ ] Feature (user facing)
• [x] Codebase improvement (dev facing)
• [ ] Meta improvement to the project (dev facing)

Due diligence

• [x] I read the contribution guidelines.

[sonarqubecloud[bot]]

Quality Gate passed

Issues
2 New issues
0 Accepted issues

Measures
1 Security Hotspot
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud

[Profpatsch]

Closing, cause I think at this point it’s probably easier to re-do from current master.