add examples of response body

[uiur]

This is changes to save examples of response body in openapi schema

ref: https://swagger.io/docs/specification/adding-examples/

You can see them as response samples in docs:

But it might be a problem when you run this spec because the schema output becomes dynamic:

% OPENAPI=1 bundle exec rspec spec/requests/tables_spec.rb
...
An error occurred in an `after(:suite)` hook.
Failure/Error: expect(system('git', 'diff', '--exit-code', '--', RSpec::OpenAPI.path)).to eq(true)

  expected: true
       got: false

  (compared using ==)

  Diff:
  @@ -1,2 +1,2 @@
  -true
  +false

[k0kubun]

Thanks 👍

But it might be a problem when you run this spec because the schema output becomes dynamic:

That after(:suite) hook (and deletion of schema at before(:suite)) is for testing rspec-openapi itself, and in normal usage it doesn't update existing fields because of how it merges generated schema. So I think it doesn't continue to change existing examples forever and it's not a big issue until we try to implement a way to merge auto-generated schema intelligently.