Add course solidity (#4668)

* add python di prograte course in bahasa

* add c# course in bahasa

* delete python no playlist course

* fixing index c# in course bahasa

* add solidity course id

free-courses-id.md

@@ -30,6 +30,7 @@
   * [Flask](#flask)
   * [PyTorch](#pytorch)
 * [Redis](#redis)
+* [Solidity](#solidity)
 * [Typescript](#typescript)
 
 
@@ -235,6 +236,11 @@
 * [Belajar Redis](https://www.youtube.com/playlist?list=PL-CtdCApEFH-7hBhz1Q-4rKIQntJoBNX3) - Programmer Zaman Now
 
 
+### Solidity
+
+* [Ethereum Blockchain Tutorial Bahasa Indonesia](https://www.youtube.com/playlist?list=PLNl8QwXqW_lvWSc3n3geFSbBtmJvEl4nz) - Odoo Indonesia vITraining
+
+
 ### Typescript
 
 * [Belajar Typescript Untuk Pemula](https://www.youtube.com/playlist?list=PL-CtdCApEFH_LJt-fhYfMMgqxirSu6EKo) - Programmer Zaman Now