feat: add plugin `gitsigns`

lua/plugins/gitsigns.lua

@@ -0,0 +1,21 @@
+
+--
+-- Super fast git decorations implemented purely in Lua
+--
+-- Source: Status column with click handlers
+-- ..............................................
+--
+-- Author: Sven Vogel
+-- Created: 07.11.2024
+-- Edited: 07.11.2024
+--
+-- ==============================================
+
+return {
+    {
+        'lewis6991/gitsigns.nvim',
+        opts = {
+            auto_attach = true,
+        }
+    }
+}