Add benchmarking script

- Fold CI scripts into local benchmark script
- Remove CI workflow
- Use importlib for pytest for identical file names across different test modules

Author: kaitj

.github/scripts/compare_benchmarks.py

@@ -26,6 +26,7 @@ htmlcov
 
 # Local data and scratch
 .scratch
+benchmarks/
 
 # Local virtual environment
 .venv

.github/scripts/run_benchmarks.py

@@ -37,6 +37,7 @@ pybids = ["pandas>=2.0.0"]
 [dependency-groups]
 dev = [
     "pdoc>=16.0.0",
+    "polars>=1.40.1",
     "pre-commit>=4.6.0",
     "pytest>=9.0.3",
     "pytest-benchmark>=5.2.3",
@@ -69,6 +70,7 @@ lint.extend-select = ["I"]
 [tool.pytest.ini_options]
 log_cli = true
 log_cli_level = "INFO"
+addopts = "--import-mode=importlib"
 markers = [
     "benchmark: Tests used for benchmarking",
     "cloud: Tests requiring cloud group dependencies",