feat(interfaceCallSignature): add support for interface call signature (

#82)

* add initial work to support interfaces with call signatures

* refactor mockCall with better variable names

* enable tests and make sure signature are not used when not provided

* add a test to cover function overload

* add documentation and intersection call signatures

docs/DETAILS.md

@@ -24,6 +24,20 @@ interface Person {
     name: ""
 } 
 */
+```
+## Interfaces with call signatures
+For overload methods it will use the first one
+```ts
+interface Person {
+    (): number
+    (): string
+    name: string 
+}
+
+const mock = createMock<Person>();
+mock() // 0
+mock.name // ""
+
 ```
 ## Classes
 ```ts