In gvim it is possible to get plugin-specific toolbars (see screenshot attached). Is something like this possible in nvim? Is there a GUI for nvim in which it is possible?
From Googling, the only thing I've been able to find is that this is an unpopular question to ask. Apparently using a toolbar is un-vim. I don't understand this. Toolbars do not necessarily involve using a mouse. They are a convenient way to get a quick list of keyboard shortcuts for plugins that may not be frequently used.
For example, sometimes I code in R and I use the excellent Nvim-R plugin. However, I can go for months at a time between R coding sessions, so I naturally forget some of the keybindings. Having a menu entry in a toolbar is a really easy way to jog my memory: I would certainly be open to non-toolbar ways to achieve the same thing. Searching through the help each time is not efficient. Quickly outputting a list of keybindings in a side-bar window would be a good solution.