chore(pixi): Add toml linting

Author: jonasfreimuth

pixi.toml

@@ -44,11 +44,12 @@ _lint-md = """
              --check
            """
 _lint-python = "ruff format --check && ruff check"
+_lint-toml = "tombi format --check ./"
 
 style = { depends-on = ["_style-md", "_style-python", "_style-toml"] }
 apply-qc = "style"
 
-lint = { depends-on = ["_lint-md", "_lint-python"] }
+lint = { depends-on = ["_lint-md", "_lint-python", "_lint-toml"] }
 qc = "lint"
 
 [environments]