Add University of Waterloo Courseware (#7360)

* Add University of Waterloo courses

* Correct typo

* Update free-courses-en.md

Move cscircles to interactive tutorials

* Update free-programming-interactive-tutorials-en.md

Move cscircles (UWaterloo) here

* lint: fix warnings

Co-authored-by: David Ordás <3125580+davorpa@users.noreply.github.com>

courses/free-courses-en.md

@@ -877,6 +877,7 @@
 * [Python Data Analysis](https://www.coursera.org/learn/python-analysis) - Scott Rixner, Joe Warren (Coursera)
 * [Python for Data Science, AI & Development](https://www.coursera.org/learn/python-for-applied-data-science-ai) - Joseph Santarcangelo (Coursera)
 * [Python for Everybody](https://www.py4e.com/lessons) (Coursera Reading Materials with YouTube Videos)
+* [Python from Scratch](https://open.cs.uwaterloo.ca/python-from-scratch/) - Centre for Education in Math and Computing (University of Waterloo)
 * [Python in 80 minutes](https://www.udemy.com/course/learn-python-in-80-minutes/) - Muhammed Ali Dilek (Udemy)
 * [Python Learn Course](https://www.kaggle.com/learn/python) - Colin Morris (Kaggle)
 * [Python OOP Tutorials - Working with Classes](https://www.youtube.com/playlist?list=PL-osiE80TeTsqhIuOqKhwlXsIBIdSeYtc) - Corey Schafer
@@ -1062,6 +1063,8 @@
 * [Learn web development](https://developer.mozilla.org/en-US/docs/Learn) - Mozilla Contributors
 * [Python Web Scraping & Crawling using Scrapy](https://www.youtube.com/playlist?list=PLhTjy8cBISEqkN-5Ku_kXG4QW33sxQo0t)
 * [The Odin Project - Learn Web Development for Free](http://www.theodinproject.com)
+* [Web Basics](https://open.cs.uwaterloo.ca/web-basics/) - Centre for Education in Math and Computing (University of Waterloo)
 * [Web Development for Beginners - A Curriculum](https://github.com/microsoft/Web-Dev-For-Beginners) - Microsoft
 * [Web Development Tutorials for Beginners](https://www.youtube.com/playlist?list=PLoYCgNOIyGAB_8_iq1cL8MVeun7cB6eNc) - LearnCode.academy
 * [Web Information Retrieval](https://www.youtube.com/playlist?list=PLAQopGWlIcya-9yzQ8c8UtPOuCv0mFZkr) - L. Becchetti, A. Vitaletti (University of Sapienza Rome)
+* [Web Programming](https://open.cs.uwaterloo.ca/web-programming/) - Centre for Education in Math and Computing (University of Waterloo)

more/free-programming-interactive-tutorials-en.md

@@ -323,6 +323,7 @@
 ### Python
 
 * [Codecademy Python course](https://www.codecademy.com/learn/python)
+* [Computer Science Circles](https://cscircles.cemc.uwaterloo.ca) - Centre for Education in Mathematics and Computing (University of Waterloo)
 * [Data Analysis with Python Certification](https://www.freecodecamp.org/learn/data-analysis-with-python/) - freeCodeCamp
 * [futurecoder](https://futurecoder.io) - Alex Hall
 * [How to Think Like a Computer Scientist: Learning with Python, Interactive Edition](http://interactivepython.org/courselib/static/thinkcspy/index.html)