Create content.md

Author: Someshdiwan

content.md

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+---
+layout: default
+title: Contents
+---
+## 🔗 Repository Quick Links
+
+- [Core Java Basics](./CoreJava/README.md)
+- [OOP Concepts](./OOP/README.md)
+- [Advanced Java](./AdvancedJava/README.md)
+- [Spring Boot Projects](./SpringBootProjects/README.md)
+- [Interview Prep](./Interview/README.md)
+- [Cheat Sheets](./Cheatsheets/README.md)
+- [Practice Problems](./Practice/README.md)