Add visual paste

[peterfication]

Closes #128

[peterfication]

So the problem we're facing with a nicer visual range support is that it seems that Telescope does not support ranges. This means we can't allow a range mapping like it is done with :Telescope ... but we need to exit the visual mode before opening Telescope.

If Telescope allowed a visual range, the same mapping could be used and we would be able to work on this range without the need for gv.

Another solution would be to provide a separate command that we control the setup for because then we could add range = true. But this would make the ergonomics of Neoclip even worse.

[peterfication]

I haven't checked out the fzf part.

[peterfication]

https://github.com/gbprod/yanky.nvim is possible to work around this limitation by using Telescope just as a picker so it has it's own command set up with a range and then accesses Telescope after it exited visual mode, see gbprod/yanky.nvim#136 (if I understood it correctly).

[peterfication]

Explanation for fzf-lua needed

[AckslD]

@peterfication sorry for the very late reply! I think this looks nice and works from what I can see when testing. It would be ideal if telescope worked in visual mode but this seems fine to me and is not breaking anything for anyone not wanting it.

[AckslD]

[nit] should this be done inside the function passed to temporary_reg_usage below in order to call this function at two places? Eg

    temporary_reg_usage(entry, function(register_name)
        if op == 'v' then
            vim.api.nvim_feedkeys('gv"'..register_name..'p', "n", false)
        else
            vim.cmd(string.format('normal! "%s%s', register_name, op))
        end
    end)

also is nvim_feedkeys required here or could it also use vim.cmd, I guess the visual part maybe breaks this?