https://github.com/neovim/neovim/issues/9213
    :h clipboard-tool
https://stackoverflow.com/questions/75548458/copy-into-system-clipboard-from-neovim
https://askubuntu.com/questions/1486871/how-can-i-copy-and-paste-outside-of-neovim
    :lua print(vim.api.nvim_get_option('updatetime'))
    :lua print(vim.api.nvim_get_option('clipboard'))
        unnamedplus

        https://neovim.io/doc/user/api.html#nvim_get_option_info2()
        https://neovim.io/doc/user/api.html#nvim_get_option_value()
            https://github.com/neovim/neovim/issues/18246
    vim.api.nvim_set_option("clipboard", "unnamed")
https://stackoverflow.com/questions/61379318/how-to-copy-from-vim-to-system-clipboard-using-wayland-and-without-compiled-vim

:echo has('clipboard')

https://github.com/neovim/neovim/blob/master/runtime/autoload/provider/clipboard.vim
  ...
  elseif !empty($WAYLAND_DISPLAY) && executable('wl-copy') && executable('wl-paste')
    let s:copy['+'] = ['wl-copy', '--type', 'text/plain']
    let s:paste['+'] = ['wl-paste', '--no-newline']
    let s:copy['*'] = ['wl-copy', '--primary', '--type', 'text/plain']
    let s:paste['*'] = ['wl-paste', '--no-newline', '--primary']
    return 'wl-copy'

https://github.com/neovim/neovim/blob/master/runtime/doc/provider.txt#L184
:help clipboard
    ...
    let g:clipboard = {
                \   'name': 'WslClipboard',
                \   'copy': {
                \      '+': 'clip.exe',
                \      '*': 'clip.exe',
                \    },
                \   'paste': {
                \      '+': 'powershell.exe -c [Console]::Out.Write($(Get-Clipboard -Raw).tostring().replace("`r", ""))',
                \      '*': 'powershell.exe -c [Console]::Out.Write($(Get-Clipboard -Raw).tostring().replace("`r", ""))',
                \   },
                \   'cache_enabled': 0,
                \ }

provider#clipboard#Call

TODO:
  +-register remap to C-C
  https://github.com/jasonccox/vim-wayland-clipboard