[nvim] Add gitsigns plugin.

.config/nvim/init.vim

@@ -66,4 +66,11 @@ require'lspconfig'.julials.setup({
     capabilities = capabilities,
 })
 
+require('gitsigns').setup({
+    signs = {
+        add = { text = '+'},
+        change = { text = '±'},
+    },
+})
+
 EOF

.vimrc

@@ -33,6 +33,9 @@ call plug#begin('~/.vim/plugged')
         " Snippet engine required for nvim-cmp (expands things from LS)
         Plug 'L3MON4D3/LuaSnip'
         Plug 'saadparwaiz1/cmp_luasnip'
+
+        " Git changes in the sign column
+        Plug 'lewis6991/gitsigns.nvim'
     end
 
 call plug#end()