DI: add logic for static class overrides

src/di/types.ts

@@ -38,6 +38,11 @@ export function isInstantiableOf<T>(what: unknown, type: StaticClass<T, any>): w
  */
 export type StaticClass<T, T2> = Function & {prototype: T} & T2  // eslint-disable-line @typescript-eslint/ban-types
 
+/**
+ * Type that identifies a value as a static class that instantiates to itself
+ */
+export type StaticInstantiable<T> = StaticClass<T, Instantiable<T>>
+
 /**
  * Returns true if the parameter is a static class.
  * @param something