F query template datamodel

Summary

For https://gitlab.indiscale.com/caosdb/customers/umg/management/-/issues/130. Simply adds a datamodel.yml s.th. people can easily set up the necessary RT and Properties for user-based query templates

Focus

Some documentation and the new datamodel yml in tools. Is this the correct place for it?

Test Environment

Start a LinkAhead with the legacy query panel (either <=0.9.2 or disable the new one) which does not have query templates configured yet (so do not use the demo profile). Execute the command in the documentation to insert the datamodel and create a UserTemplate record. Verify that there is a query shortcut afterwards.

Check List for the Author

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• All automated tests pass
• Reference related issues
• Up-to-date CHANGELOG.md (or not necessary)
• Up-to-date JSON schema (or not necessary)
• Appropriate user and developer documentation (or not necessary)
  • How do I use the software? Assume "stupid" users.
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• Annotations in code (Gitlab comments)
  • Intent of new code
  • Problems with old code
  • Why this implementation?

Check List for the Reviewer

• I understand the intent of this MR
• All automated tests pass
• Up-to-date CHANGELOG.md (or not necessary)
• Appropriate user and developer documentation (or not necessary)
• The test environment setup works and the intended behavior is reproducible in the test environment
• In-code documentation and comments are up-to-date.
• Check: Are there specifications? Are they satisfied?

For further good practices have a look at our review guidelines.