docs: update project todo list

docs/TODO.md

@@ -3,6 +3,8 @@
 - machoke
 - falinks
 - dotfiles
+- xatu
+- nix-style / refactor
 
 # project ideas
 
@@ -18,8 +20,8 @@
 - amazon / actualbudget exporter
 - vim-obsidian-markdown
 - dictionary cli tool
-- repo-local Nix style linter
 - kitchen.md
+- Rust project creator
 
 # migration
 
@@ -112,9 +114,9 @@ Review Nix files in entrypoint order:
 
 - [x] `flake.nix`
 - [x] `src/dotfiles/default.nix`
-- [ ] `src/dotfiles/util.nix`
-- [ ] `src/dotfiles/formatter.nix`
-- [ ] `src/dotfiles/apps.nix`
+- [x] `src/dotfiles/util.nix`
+- [x] `src/dotfiles/formatter.nix`
+- [x] `src/dotfiles/apps.nix`
 - [ ] `src/dotfiles/registry.nix`
 - [ ] `configs/nixos/registry/address.nix`
 - [ ] `configs/nixos/registry/env-var.nix`