chore: add pytest-cov and CI workflow

Add GitHub Actions workflow for running tests with coverage on Python 3.8 and 3.11.

Configure pytest-cov, coverage thresholds and expand testpaths in pyproject.toml.

Update .gitignore for .ruff_cache, .mypy_cache, *.egg-info and .coverage.

pyproject.toml

@@ -1,13 +1,19 @@
+[build-system]
+requires = ["setuptools>=61", "wheel"]
+build-backend = "setuptools.build_meta"
+
 [project]
+name = "kiauh"
+version = "0.0.0"
 requires-python = ">=3.8"
 
 [project.optional-dependencies]
-dev=["ruff", "mypy", "pytest"]
+dev = ["ruff", "mypy", "pytest", "pytest-cov"]
 
 [tool.ruff]
 required-version = ">=0.9.10"
 respect-gitignore = true
-exclude = [".git",".github", "./docs"]
+exclude = [".git", ".github", "./docs"]
 line-length = 88
 indent-width = 4
 output-format = "full"
@@ -24,6 +30,8 @@ extend-select = ["I"]
 [tool.mypy]
 python_version = "3.8"
 platform = "linux"
+explicit_package_bases = true
+mypy_path = "kiauh"
 check_untyped_defs = true
 ignore_missing_imports = true
 warn_redundant_casts = true
@@ -31,7 +39,28 @@ warn_unused_ignores = true
 warn_return_any = true
 warn_unreachable = true
 
+[tool.coverage.report]
+fail_under = 65
+skip_covered = false
+
 [tool.pytest.ini_options]
 minversion = "8.2.1"
-testpaths = ["kiauh/core/simple_config_parser/tests", "kiauh/utils/tests"]
+testpaths = [
+    "kiauh/components/klipper/services/tests",
+    "kiauh/components/moonraker/services/tests",
+    "kiauh/components/moonraker/utils/tests",
+    "kiauh/components/webui_client/services/tests",
+    "kiauh/components/webui_client/tests",
+    "kiauh/components/webui_client/menus/tests",
+    "kiauh/core/backends/tests",
+    "kiauh/core/cli/tests",
+    "kiauh/core/instance_manager/tests",
+    "kiauh/core/menus/tests",
+    "kiauh/core/services/tests",
+    "kiauh/core/settings/tests",
+    "kiauh/core/simple_config_parser/tests",
+    "kiauh/extensions/tests",
+    "kiauh/tests",
+    "kiauh/utils/tests",
+]
 pythonpath = ["kiauh"]