feat: add this keyword

Author: ExploitEngineer

part6 (Object-Oriented Programming)/07_this.js

@@ -0,0 +1,13 @@
+/*
+🔹 3. this keyword
+✅ What is this?
+this refers to the object that is executing the current function.
+💡 Rule of Thumb:
+Context	this refers to
+In a method:                                The object that owns the method
+Alone (non-strict):                       Global object (window)
+Alone (strict):                                undefined
+Inside an arrow function	        Inherits this from the surrounding lexical scope
+In event listener	                        The element that received the event
+In constructor	                             The newly created object
+*/