Create scheduler component documentation

[s-sparrow]

What: Create documentation that takes a developer through the process of adding a component to the Scheduler.

Why: To provide members with a document to read that will help them add their component into the scheduler.

Where: Append to the README.md file in the scheduler_documentation branch of the Scheduler.

Subtasks:

• Learn how scheduler works by referring to Scheduler README.md in scheduler_documentation branch
• Learn how to add components to the scheduler by looking at the comments and example in the Scheduler_tutorial branch
• Write documentation