Fix the mappings for count search

[voyeg3r]

When we set these mappings:

nmap n n:Beacon<cr>
nmap N N:Beacon<cr>
nmap * *:Beacon<cr>
nmap # #:Beacon<cr>

We lose the count search like: [3/15]

[voyeg3r]

I also posted on https://neovim.discourse.group/ a question and an initial solution for the problem, but using vimscript, there I asked how to translate the proposed solution to lua:

https://neovim.discourse.group/t/how-to-append-mappings-in-lua/2118