feat: Support schema property examples

[dsuket]

Description

Support examples of schema property

Motivation and Context

To address Issue #1158, I need to organize the example-related parts.
This is the 4th(final) step toward that goal.

Please see below first.

• refactor: refactor request and response example #1161
• refactor: change ResponseSamples to CodeSamples #1162
• feat: Add schema tab in Request and Response #1164

How Has This Been Tested?

• Pass npm run build
• Pass npm run test
• I went through the demo API and tests and confirmed that the examples are being displayed properly.

Screenshots (if appropriate)

example in request parameters schema

examples in request parameters schema

example of properties in requestBody schema

examples of properties in requestBody schema

example of schema properties in response

examples of schema properties in response

Types of changes

• New feature (non-breaking change which adds functionality)

Checklist

• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes if appropriate.
• All new and existing tests passed.