Move cursor to popup panel

[Dreaming-Codes]

As mentioned in this discussion, it would be great to have a way to jump directly into the popup panel.

There are many situations where I’ve found the need to copy information or open a link from the LSP popup or similar contexts. Additionally, it would be helpful to quickly navigate to the definitions of function parameters displayed in the popup. While it’s often possible to achieve this by first jumping to the function’s definition and then locating the parameter’s definition within the function signature, there are cases where this process isn’t as straightforward. For example, in Rust, if a macro is used to define a function, directly accessing the parameter definitions may not be possible. This highlights a solid use case for implementing such a feature.

[nik-rev]

I have implemented this a while ago in my PR feat: new command to open hover documentation in a new buffer instead of a popup by nik-rev · Pull Request #12208 · helix-editor/helix

which just adds a keybinding to dump this information into a buffer. Way simpler but it works quite well.