build(deps): Add pytest-cov as a developer dependency

pyproject.toml

@@ -24,6 +24,7 @@ mypy = "^1.15.0"
 pre-commit = "^4.2.0"
 pylint = "^3.3.7"
 pytest = "^8.3.5"
+pytest-cov = "^6.1.1"
 reuse = "^5.0.2"
 
 [tool.black]
@@ -37,6 +38,15 @@ version_provider = "poetry"
 update_changelog_on_bump = true
 major_version_zero = true
 
+[tool.coverage.report]
+show_missing = true
+skip_covered = true
+fail_under = 91
+omit = ["examples/*"]
+
+[tool.coverage.run]
+branch = true
+
 [tool.isort]
 force_sort_within_sections = true
 line_length = 120
@@ -45,6 +55,9 @@ profile = "black"
 [tool.pylint.format]
 max-line-length = 120
 
+[tool.pytest.ini_options]
+addopts = "--cov=. --no-cov-on-fail"
+
 [build-system]
 requires = ["poetry-core>=2.0.0,<3.0.0"]
 build-backend = "poetry.core.masonry.api"