Kafka client config in markdown-template and html-template

[dalelane]

pull requests:
asyncapi/markdown-template#174
asyncapi/asyncapi-react#447

A very tiny enhancement for the documentation generators @asyncapi/markdown-template and @asyncapi/html-template to improve the documentation generated for Kafka applications.

Inspired by a discussion in Slack
https://asyncapi.slack.com/archives/C0230UAM6R3/p1631889206093800

Examples in the PRs, but essentially it means that doc generated for Kafka apps include the sasl.mechanism and security.protocol fields that you have to provide when configuring Kafka clients.

e.g.

asyncapi: '2.2.0'
info:
  title: Streetlights Kafka API
  version: '1.0.0'
  description: |
    The Smartylighting Streetlights API allows you to remotely manage the city lights.

servers:
  test:
    url: test.mykafkacluster.org:8092
    protocol: kafka-secure
    description: Test broker
    security:
      - saslScram: []

components:
  securitySchemes:
    saslScram:
      type: scramSha512
      description: create credentials in the dev portal

results in this markdown:

and this html: