make .gitignore dynamic based on selected backend

src/scicookie/{{cookiecutter.project_slug}}/.gitignore

@@ -94,20 +94,24 @@ ipython_config.py
 #   install all needed dependencies.
 #Pipfile.lock
 
-# poetry
-#   Similar to Pipfile.lock, it is generally recommended to include poetry.lock in version control.
-#   This is especially recommended for binary packages to ensure reproducibility, and is more
-#   commonly ignored for libraries.
-#   https://python-poetry.org/docs/basic-usage/#commit-your-poetrylock-file-to-version-control
-#poetry.lock
-
-# pdm
-#   Similar to Pipfile.lock, it is generally recommended to include pdm.lock in version control.
-#pdm.lock
-#   pdm stores project-wide configurations in .pdm.toml, but it is recommended to not include it
-#   in version control.
-#   https://pdm.fming.dev/#use-with-ide
-.pdm.toml
+{%- if cookiecutter.build_system == "poetry" %}
+# poetry build system
+poetry.lock
+
+{%- elif cookiecutter.build_system == "mesonpy" %}
+# meson build system
+meson.build
+meson_options.txt
+
+{%- elif cookiecutter.build_system == "pdm" %}
+# pdm build system
+pdm.lock
+
+{%- elif cookiecutter.build_system == "maturin" %}
+# maturin build system
+Cargo.lock
+
+{%- endif %}
 
 # PEP 582; used by e.g. github.com/David-OConnor/pyflow and github.com/pdm-project/pdm
 __pypackages__/