chore: add stylua to format the codebase, and run on CI (#1055)

lua/nvim-tree/renderer/padding.lua

@@ -1,31 +1,31 @@
 local M = {}
 
 function M.get_padding(depth)
-  return string.rep(' ', depth)
+  return string.rep(" ", depth)
 end
 
 local function get_padding_arrows(icon_state)
   return function(depth, _, _, node)
     if node.nodes then
-      local icon = icon_state.icons.folder_icons[node.open and 'arrow_open' or 'arrow_closed']
-      return string.rep(' ', depth - 2)..icon..' '
+      local icon = icon_state.icons.folder_icons[node.open and "arrow_open" or "arrow_closed"]
+      return string.rep(" ", depth - 2) .. icon .. " "
     end
-    return string.rep(' ', depth)
+    return string.rep(" ", depth)
   end
 end
 
 local function get_padding_indent_markers(depth, idx, tree, _, markers)
   local padding = ""
   if depth ~= 0 then
-    local rdepth = depth/2
+    local rdepth = depth / 2
     markers[rdepth] = idx ~= #tree.nodes
-    for i=1,rdepth do
+    for i = 1, rdepth do
       if idx == #tree.nodes and i == rdepth then
-        padding = padding..'└ '
+        padding = padding .. "└ "
       elseif markers[i] then
-        padding = padding..'│ '
+        padding = padding .. "│ "
       else
-        padding = padding..'  '
+        padding = padding .. "  "
       end
     end
   end
@@ -33,7 +33,7 @@ local function get_padding_indent_markers(depth, idx, tree, _, markers)
 end
 
 function M.reload_padding_function()
-  local icon_state = require'nvim-tree.renderer.icons'.get_config()
+  local icon_state = require("nvim-tree.renderer.icons").get_config()
 
   if icon_state.show_folder_icon and icon_state.show_folder_arrows then
     M.get_padding = get_padding_arrows(icon_state)