Course planning articles

[Lillliant]

What are you trying to accomplish?

Add a section that explains some things about course planning (ex. what electives can CS student take for Arts/Social Science, recommended sequence, and special course)

How are you accomplishing it?

By adding respective Markdown articles using information from UWindsor website or the Hub.

Is there anything reviewers should know?

Checks before you create your pull request

• [x] Did you read and follow article requirements?
• [x] Did you run prettier?
• [x] Is it safe to rollback this change if anything goes wrong?

[prairir]

feel free to merge whenever you want