Feature/RFC show structural definition when hovering over a typed dict

### Describe the Bug

When hovering over a typed dict, instead of showing just the class name, maybe we should show something like

`{"x": int, "y": str, ...}` (no ... if the TD is closed)

Open questions:
Is this a good idea? One con I can think of is that the hover is no longer a valid type form.
Could we do the same with namedtuple? (maybe not since it's hard to express both names & positions)

### Sandbox Link

_No response_

### (Only applicable for extension issues) IDE Information

_No response_