gitignore custom dir | add example configs

examples/example_chadrc.lua

@@ -0,0 +1,13 @@
+-- This is an example chadrc file , its supposed to be placed in /lua/custom dir
+-- lua/custom/chadrc.lua
+
+local M = {}
+
+-- make sure you maintain the structure of `core/default_config.lua` here,
+-- example of changing theme:
+
+M.ui = {
+   theme = "gruvchad",
+}
+
+return M