Sections, Professors, and Courses tables contain miscategorized information

**Describe the bug**
Some columns from the Sections, Professors, and Courses tables seem to be better suited to each other. For example, the alias and contact info columns from Sections would be better in Professors, and the type column would be better in Courses.

The current organization doesn't allow us to answer a question like "Is CSC 480 a lab?" and introduces potentially unwanted behavior (like fetching a phone number from a section).