docs: make sure there is a summary for all API endpoints

[kjellwinblad]

Many HTTP API endpoints did not have a summary when looking at the API docs at "http://emqx_host_name:18083/api-docs". This has been fixed by making sure there is a summary corresponding to all endpoints.

Many of the labels might not be perfect yet but I think this can be improved gradually once we have the infrastructure provided by this PR.

Fixes:
https://emqx.atlassian.net/browse/EMQX-9767

Summary

🤖 Generated by Copilot at 09ddec7

The pull request improves the API documentation, validation, and localization of several emqx apps by using hocon schemas and macros. It also updates the version numbers of the emqx_dashboard, emqx_management, and emqx_prometheus apps and adds labels for some API operations. The affected files are mostly in the apps and rel/i18n directories.

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

[zhongwencool]

LGTM