Report error if class uses extended type before its declaration

[sheetalkamat]

Fixes #4341

[mhegazy]

i would also add a test with an expression in an extend clause, class A extends foo(0)<string> {}
and one for module aliases

import d from "mod"; 
class B extends d { // no error here
}

[sheetalkamat]

added this

[sheetalkamat]

I am still working on reporting error if alias is declared before it is referencing entity(internal alias only)
Update: its done now.

[JsonFreeman]

Why are they allowed to be in different lexical scopes?

[mhegazy]

use ts.indexOf instead of array.prototype.indexof

[JsonFreeman]

Fix spacing at the end of the line

[JsonFreeman]

isDefinedBeforeOrAt

[weswigham]

This PR is superseded by #8636 which has been successfully merged, right?

[mhegazy]

closing in favor of #8636