Add more structure to scripts directory

scripts/default.nix

@@ -1,10 +1,10 @@
 {pkgs, ...}: {
   home.packages = [
     (pkgs.writeShellScriptBin "git-sync-all"
-      (builtins.readFile ./git-sync-all.sh))
+      (builtins.readFile ./shell/git-sync-all.sh))
     (pkgs.writeShellScriptBin "rsync-local-config"
-      (builtins.readFile ./rsync-local-config.sh))
+      (builtins.readFile ./shell/rsync-local-config.sh))
     (pkgs.writeShellScriptBin "xdg-query-program"
-      (builtins.readFile ./xdg-query-program.sh))
+      (builtins.readFile ./shell/xdg-query-program.sh))
   ];
 }