Document possible security risks for using hydromt

[savente93]

HydroMT version checks

• [X] I have checked that the issue still exists on the latest versions of the docs on main here

Kind of issue

Docs are missing

Location of the documentation

No response

Documentation problem

There are some possible security issues with using HydroMT, such as using malicious plugins that anyone can publish. Since there is not a whole lot we can do about that, we should at least have a document explaining some of the things to look out for.

Suggested fix for documentation

No response