resolves #241744 add Kroki to support more diagrams in AsciiDoc and Markdown

What does this MR do?

Add Kroki to support more diagrams in AsciiDoc and Markdown.

Resolves #241744 (closed) Resolves #16816 Resolves #28735 Resolves #22365 Related #24070 (closed) (using Erd)
Related #31818 (closed)

Screenshots

Admin > Settings

Enable Kroki and configure the server URL:

Preview of an AsciiDoc file with Kroki enabled

Preview of a Markdown file with Kroki enabled

Preview of an AsciiDoc file with Kroki disabled

Does this MR meet the acceptance criteria?

Conformity

• Changelog entry
• Documentation (if required)
• Code review guidelines
• Style guides
• Database guides

Availability and Testing

• Review and add/update tests for this feature/bug. Consider all test levels. See the Test Planning Process.
• Informed Infrastructure department of a default or new setting change, if applicable per definition of done

Testing DB Migrate and Rollback