feat: hide data items from configuration files and documentation.

[zhongwencool]

Fixes EMQX-9561,EMQX-9560,EMQX-9504,EMQX-9559
Hide data items(rule_engine/bridge/authz/authn) from configuration files and document.

Summary

🤖 Generated by Copilot at cc2beda

Refactor the configuration file schemas to hide some sections by default and support HOCON syntax. Move the bridges and rule_engine schemas from their respective apps to the emqx app, and add the importance attribute to the authorization, plugins, bridges, and rule_engine schemas. Use the ?HOCON macro to wrap the schemas that need HOCON syntax.

PR Checklist

Please convert it to a draft if any of the following conditions are not met. Reviewers may skip over until all the items are checked:

• Added tests for the changes
• Changed lines covered in coverage report
• Change log has been added to changes/{ce,ee}/(feat|perf|fix)-<PR-id>.en.md files
• For internal contributor: there is a jira ticket to track this change
• If there should be document changes, a PR to emqx-docs.git is sent, or a jira ticket is created to follow up
• Schema changes are backward compatible

Checklist for CI (.github/workflows) changes

• If changed package build workflow, pass this action (manual trigger)
• Change log has been added to changes/ dir for user-facing artifacts update