Add two links for data structure visualizations

Author: codingEzio

README.md

@@ -2,6 +2,11 @@
 ### Info
 - Python: `3.7.3`
 
+### Resources
+- Data Structure Visualization
+    1. [*visualgo.net*](https://visualgo.net/en)
+    2. [*www.cs.usfca.edu*](https://www.cs.usfca.edu/~galles/visualization/Algorithms.html)
+
 ### Note
 - I'm really really *bad* at <u>data structures</u> & <u>algorithms</u>.
     > So, I'm actually kinda *re-learn* all of these completely from the basics while reading this book. That brings my main point, I know the code here is not *that* good, and not *that* comprehend, but I believe these notes & implementations could serve as a great starting point for learning the **basics** of algorithms, most of them is **self-contained** <small>(yep)</small>.