Events YAML schema

[ashutoshmindgrep]

• [x] Top level event definition need to be checked for all kinds of event types (as of now it only support for http and kafka), salesforce, cron needs to be added
• [x] Conditional check for more different kind of events need improvements
• [x] Params need more refinements, It should adhere to OpenAPI specification v3.1.0 Parameter Object
• [x] Event body should adhere to OpenAPI specification v3.1.0 Request Body Object
• [x] Event responses should adhere to OpenAPI specification v3.1.0 Response Object
• [x] authn, fn, on_validation_error should be top level properties in an event and should be validated according to docs

[rohitgodspeed]

Done with event, params, body, authn, on_validation_error.

[rohitgodspeed]

• More refinements is added now , body, params, response are more clear and easy to generate ( on one click )
• required: [] is added in every Object.