chore: update gitconfig structure and add base config

scripts/gitconfig

@@ -1,6 +1,6 @@
 #!/usr/bin/env bash
 
-CONFIG_DIR="$DOTFILES_INSTALL_DIR/.gitconfig.d"
+CONFIG_DIR="$DOTFILES_INSTALL_DIR/.gitconfig.d/var"
 
 echo
 echo "[+] Generating Gitconfig"
@@ -8,6 +8,8 @@ echo
 
 rm -f "$HOME/.gitconfig"
 
+cp "$DOTFILES_INSTALL_DIR/.gitconfig.d/base.gitconfig" "$HOME/.gitconfig"
+
 for config in "$CONFIG_DIR"/*.gitconfig; do
     [ -e "$config" ] || continue
 
@@ -23,7 +25,6 @@ for config in "$CONFIG_DIR"/*.gitconfig; do
     echo "Create config for $domain"
 
     cat <<EOF >> "$HOME/.gitconfig"
-
 [includeIf "hasconfig:remote.*.url:https://**$domain/**"]
     path = $config
 EOF