fix: Disable Kubernetes module by default (#488)

Given the global nature of the Kubernetes module, the module has been disabled by default. The opportunity has also been taken to refactor the Kubernetes module to use the new config module.

src/configs/mod.rs

@@ -2,6 +2,7 @@ pub mod aws;
 pub mod battery;
 pub mod character;
 pub mod dotnet;
+pub mod kubernetes;
 pub mod rust;
 
 use crate::config::{ModuleConfig, RootModuleConfig};