Publish JSON schema for airflow.cfg

Description

There is already a good structured YAML file providing metadata about all valid configuration options in airflow.cfg: airflow/config_templates/config.yml.

I think publishing the same data as a JSON schema and eventually to https://www.schemastore.org/json/ could be very useful.

Use case/motivation

• People could use extensions like Even Better TOML with their IDE to benefit from validation and powerful auto-completion while editing airflow.cfg
• It would be easy to leverage pre-commit hooks or other CI tools to catch mistakes in the config file.

Airflow won't complain if the configuration file contains a typo or a non-existent configuration key making it easy to make mistakes. It could also make it easier to catch invalid values earlier.

Related issues

No response

Are you willing to submit a PR?

• Yes I am willing to submit a PR!

Code of Conduct

• I agree to follow this project's Code of Conduct