nvim: Fix signcolumn jumping

When lsp or gitsigns would show me a symbol in the signcolumn the whole
editor page would jump ever so slightly to the right (one symbol, to be
precise).

This fixes it to show numbers in the signcolumn and just exchange number
for sign when something should be shown.
Makes numbers a little less readable but editing experience a whole lot
smoother.

nvim/.config/nvim/lua/settings.lua

@@ -1,19 +1,12 @@
 require("helpers.vimoptions")
 
-local default_builtins_disabled = {
-    "netrw",
-    "netrwPlugin"
-}
+local default_builtins_disabled = {"netrw", "netrwPlugin"}
 local disable_builtins = function(builtins)
-    for _, plugin in pairs(builtins) do
-        vim.g["loaded_" .. plugin] = 1
-    end
+    for _, plugin in pairs(builtins) do vim.g["loaded_" .. plugin] = 1 end
 end
 
 local apply_options = function(opts)
-    for k, v in pairs(opts) do
-        vim.opt[k] = v
-    end
+    for k, v in pairs(opts) do vim.opt[k] = v end
 end
 
 local o = {
@@ -39,6 +32,8 @@ local o = {
     -- dNUMBERd deletions
     number = true,
     relativenumber = true,
+    -- puts the numbers into the signcolumn so when git/lsp show signs there's no jump
+    signcolumn = 'number',
 
     -- keeps an undofile next to files so that you can even undo if vim is closed
     -- in between
@@ -73,7 +68,7 @@ local o = {
     equalalways = false,
 
     --  make sure there's always *some* context below cursor
-    scrolloff=4,
+    scrolloff = 4
 
 }