Changed . token to _dot

This change allows the dotfiles to work with chezmoi (e.g: on windows)
and improves grepability with neovim/telescope

dot_config/nushell/nu_scripts/example-config/config.nu

@@ -0,0 +1,13 @@
+# ~/.config/nushell/config.nu
+#
+# Nushell-s config file used in engine-q.
+#
+# It fetches all definitions and environment variables from the `init` module.
+
+def build-config [] { { footer_mode: "50" } }
+
+let config = build-config
+
+use ~/.config/nushell/init.nu *
+
+alias gd = git diff