Function get 

pub fn get() -> Option<Vec<JumpEntry>>

Retrieves the current jumplist from Neovim.

Calls Nvim’s getjumplist() function and extracts the jump entries vector. Errors are handled internally by notifying Nvim and returning None.

Errors

• Lua function call fails when invoking getjumplist.
• Deserialization fails when parsing the jumplist structure.
• All errors are notified to Nvim via crate::notify::error and converted to None.