Remastering of documentation provider

- Remove whole file resolve
- Take already resolved element
- Get kotlin element behind the wrapper directly
- Remove outdated isKotlinDeclaration method
- More tests

idea/testData/editor/quickDoc/JavaMethodUsedInKotlin_Data.java

@@ -0,0 +1,9 @@
+class Test {
+    /**
+     * Java Method
+     */
+    @KotlinSignature("fun foo(param: String): Array<out Any>")
+    public static Object[] foo(String param) {
+        return new Object[0];
+    }
+}