Add: OOP (#2173)

* Add Oop Description, core concepts & related

* Update content/roadmaps/114-software-architect/content/105-patterns-and-design-principles/100-oop.md

Co-authored-by: Kamran Ahmed <kamranahmed.se@gmail.com>

content/roadmaps/114-software-architect/content/105-patterns-and-design-principles/100-oop.md

@@ -1 +1,3 @@
-# Oop
+# OOP
+
+Object-oriented programming (OOP) is a computer programming model that organizes software design around data, or objects, rather than functions and logic. An object can be defined as a data field that has unique attributes and behavior.