Enhance

[jinzhongjia]

This issue list some feature should be added or enhanced.

• [ ] CallHierarchy (But I don't know what the UI should be)
• [ ] code_action preview (waht the UI should be)
• [ ] rename preview (what the UI should be)
• [ ] new_hover (now, neovim's builtin hover highlight is not stable, when it is stable, I will switch the new highligtht)
• [x] More efficient jump-history implementation (now is using tagstack)
• [x] keybinding store and restore

Regarding design principles, you can read here, https://github.com/jinzhongjia/LspUI.nvim/issues/12

[jinzhongjia]

lightbulb code may need to be adjusted