Table template

[sanikolaev]

Proposal:

Let's prepare a specification and implement the table template functionality for RT mode.

We already have this feature in plain mode: https://manual.manticoresearch.com/Creating_a_table/Local_tables/Template_table#Template-table

The requirements are:

• SQL statements and JSON endpoints for managing templates
• Each template should support a table name pattern
• When a table is created, if its name matches a template's pattern, it should inherit the settings from that template.

Checklist:

^{To be completed by the assignee. Check off tasks that have been completed or are not applicable.}

• Implementation completed
• Tests developed
• Documentation updated
• Documentation reviewed
• Changelog updated
• OpenAPI YAML updated and issue created to rebuild clients