nvim: Add oscyank to yank from anywhere

Added oscyank plugin which allows, through the `:OSCYank` command, to
put stuff into your local clipboard from *anywhere*, even through remote
ssh sessions and so on.
Requires a supported terminal emulator but honestly, most semi
well-known ones are on the list already.

nvim/.config/nvim/lua/plugins.lua

@@ -25,6 +25,7 @@ require("packer").startup(function()
     } -- allow seamless navigation between vim buffers and tmux splits
     use 'jeffkreeftmeijer/vim-numbertoggle' -- toggles numbers to absolute for all buffers but the current which is relative
     use 'RRethy/vim-illuminate' -- highlight other occurences of the word under cursor
+    use 'ojroques/vim-oscyank' -- yank from *anywhere* (even ssh session) to clipboard, using :OSCYank
     use 'ggandor/lightspeed.nvim' -- jump between letters with improved fFtT quicksearch, mimics sneak
     -- use { -- weird errors currently
     --     'lukas-reineke/indent-blankline.nvim', -- show a vertical line for each indentation