refactor(nix): use flake-parts (#642)

refactor(nix): split into flake parts module and add shell.nix

chore: add prettier to treefmt and pin version

chore(nix): add prettier exclude

chore(nix): bump pnpm to v10.18.2

feat(nix): add overlay for nodejs

feat(nix): add overlay for nodejs

chore: consolidate .editorconfig

package.json

@@ -136,7 +136,7 @@
         "gulp-zip": "^6.1.0",
         "path": "^0.12.7",
         "postcss": "^8.5.3",
-        "prettier": "^3.5.2",
+        "prettier": "3.6.2",
         "react-dev-utils": "^12.0.1",
         "semantic-release": "^24.2.3",
         "storybook": "^8.6.0",