Move stubs from ./stubs to ./shared/Stubs

Gathers all shared test code in single place.

tests/unit/shared/Stubs/FunctionCallArgumentStub.ts

@@ -0,0 +1,17 @@
+import { IFunctionCallArgument } from '@/application/Parser/Script/Compiler/Function/Call/Argument/IFunctionCallArgument';
+
+export class FunctionCallArgumentStub implements IFunctionCallArgument {
+  public parameterName = 'stub-parameter-name';
+
+  public argumentValue = 'stub-arg-name';
+
+  public withParameterName(parameterName: string) {
+    this.parameterName = parameterName;
+    return this;
+  }
+
+  public withArgumentValue(argumentValue: string) {
+    this.argumentValue = argumentValue;
+    return this;
+  }
+}