home: vim: add 'nvim-osc52'

I do get the message when copying into the clipboard while ssh-ing.

But trying to paste from my system clipboard shows that it did *not* get
copied. This seems to only happen inside tmux.

However tmux itself *does* copy to the clipboard correctly through OSC52.

home/vim/default.nix

@@ -60,6 +60,7 @@ in
 
       # General enhancements
       vim-qf # Better quick-fix list
+      nvim-osc52 # Send clipboard data through terminal escape for SSH
 
       # Other wrappers
       git-messenger-vim # A simple blame window

home/vim/plugin/settings/ssh.lua

@@ -0,0 +1,17 @@
+if not require("ambroisie.utils").is_ssh() then
+    return
+end
+
+local function copy(lines, _)
+  require('osc52').copy(table.concat(lines, '\n'))
+end
+
+local function paste()
+  return {vim.fn.split(vim.fn.getreg(''), '\n'), vim.fn.getregtype('')}
+end
+
+vim.g.clipboard = {
+  name = 'osc52',
+  copy = {['+'] = copy, ['*'] = copy},
+  paste = {['+'] = paste, ['*'] = paste},
+}