openapi add bash scripts usage example

[Anilople]

Is your feature request related to a problem? Please describe.
Some companies use openapi with bash scripts.

Provide examples of how to use openapi with bash scripts is worth doing, because those companies can use official bash scripts without write them by self.

We can provide some bash functions.

Describe the solution you'd like

1. Add those bash scripts to folder scripts/openapi/bash
2. Or Add those bash scripts to docs https://www.apolloconfig.com/#/zh/usage/apollo-open-api-platform