📦📝 Fix typo in readme and add instructions for development tools

Author: tsvikas

project_name/README.md.jinja

@@ -45,7 +45,8 @@ import {{ package_name }}
 - use `uv run just format` to format the code.
 - use `uv run just lint` to see linting errors.
 - use `uv run just test` to see run tests.
-- use `uv run ruff check` to run all the checks (format, lint, test, and pre-commit).
+- use `uv run just check` to run all the checks (format, lint, test, and pre-commit).
+- Run a specific tool directly, with `uv run pytest`/`ruff`/`mypy`/`black`/...
 
 ### Build