Use Parameter Descriptors

Feature request

Feature description

Parameters can be declared with a rcl_interfaces::msg::ParameterDescriptor that embeds information like the description or even bounds checking on parameters.

Implementation considerations

This would probably involve rewriting some nav2 utils for declaring parameters.

Realistically speaking, unless there are user contributions in that area, that is probably not something the maintainers are going to invest the time into given the time we've spent developing and maintaining the documentation on navigation.ros.org. Its definitely not a bad enhancement, but this feels like something that wouldn't actually happen unless we had an intern or student working with us for a couple of months. I think it would be difficult for me to even find junior contributors that would be willing to do this.

I'm going to close this as a wontfix, I don't think realistically anyone is going to be able to justify time to work on this and we have alternative documentation containing all of this information.

I'd like to keep the issue tracker with "realistic" things we're going to work on / complete rather than aspirational items that I know I won't be able to cox anyone into working on & could increase maintenance costs by maintaining duplicate sets of information in documentation and in the parameter descriptions.