Add aliases for common OAS `given` targets

[heitortsergent]

Chore summary We have the aliases feature to help users target certain parts of a spec without having to remember the JSONPath expression, and we have 2 already created here for OAS.

We can expand this list of aliases to cover more common targets that people use in their rulesets to make it easier for users to create and maintain rulesets.

Tasks

• [ ] Add new aliases
  • [ ] A
  • [ ] B
  • [ ] More...
• [ ] Add docs

[mnaumanali94]

Would require: #2237

[heitortsergent]

Updated description with link to Notion page with list of new possible aliases: https://www.notion.so/stoplight/List-of-Aliases-9ff1454f3599450aa11d4588fda75f2d