OAS examples for standard methods

[rambleraptor]

Fixes https://github.com/aep-dev/aep.dev/issues/118

This adds OAS examples + guidance for the rest of the standard methods.

🍱 Types of changes

What types of changes does your code introduce to AEP? Put an x in the boxes that apply

• [x] Enhancement

📋 Your checklist for this pull request

Please review the AEP Style and Guidance for contributing to this repository.

General

• [x] Basic Guidance is met.
• [x] Ensure that your PR references AEPs correctly.
• [x] My code has been formatted (usually prettier -w .)

Additional checklist for a new AEP

• [x] A new AEP should be no more than two pages if printed out.
• [x] Ensure that the PR is editable by maintainers.
• [x] Ensure that File structure guidelines are met.
• [x] Ensure that Document structure guidelines are met.

💝 Thank you!