chore(openapi): reformat and fix typos

[SanchithHegde]

Type of Change

• Bugfix
• New feature
• Enhancement
• Refactoring
• Dependency updates

Description

(If you're reviewing, it's better to follow changes in each commit, except for the first one. For the first commit, check diff without whitespace changes.)

This PR includes the following changes:

• Re-formats the OpenAPI spec YAML file to use 2 spaces instead of 4 for indentation.
  • I just ran the Prettier VS Code Extension on the file.
  • View the diff for the commit without whitespace changes here.
• Updates the base URLs in the description to be clickable links.
• Replaces some occurrences of jarnura and Arun Raj with placeholders.
• Fixes typos in the OpenAPI spec file (~50 of them)
• Re-generates the Postman collection from the OpenAPI spec file.

Motivation and Context

This PR paves the way for including a "quick start" section in the OpenAPI spec and the Postman collection, which will be made in a separate PR.

How did you test it?

N/A

Checklist

• I formatted the code cargo +nightly fmt
• I addressed lints thrown by cargo clippy
• I reviewed submitted code
• I added unit tests for my changes where possible
• I added a CHANGELOG entry if applicable