add diffview pluging and tweaked code actions mapping

lua/custom/plugins/diffview.lua

@@ -0,0 +1,4 @@
+return {
+  'sindrets/diffview.nvim',
+  cmd = { 'DiffviewOpen', 'DiffviewClose', 'DiffviewToggleFiles', 'DiffviewFocusFiles' },
+}

lua/kickstart/plugins/neo-tree.lua

@@ -21,6 +21,19 @@ return {
           ['\\'] = 'close_window',
         },
       },
+      filtered_items = {
+        visible = false,
+        hide_dotfiles = false,
+        hide_gitignored = true,
+        hide_by_name = {
+          '.git',
+          '.DS_Store',
+        },
+        never_show = {},
+        always_show_by_pattern = {
+          '.env*',
+        },
+      },
     },
 
     buffers = {