feat: full upgrade to python3, tests, etc.

.pre-commit-config.yaml

@@ -0,0 +1,34 @@
+repos:
+- repo: https://github.com/astral-sh/ruff-pre-commit
+  rev: "v0.11.4"
+  hooks:
+    - id: ruff
+      args: ["--fix"]
+    - id: ruff-format
+- repo: https://github.com/pre-commit/pre-commit-hooks
+  rev: v5.0.0
+  hooks:
+    - id: check-ast
+    - id: check-builtin-literals
+    - id: check-docstring-first
+    - id: check-executables-have-shebangs
+    - id: check-json
+    - id: check-merge-conflict
+    - id: check-shebang-scripts-are-executable
+    - id: check-toml
+    - id: check-yaml
+    - id: debug-statements
+    - id: detect-aws-credentials
+    - id: double-quote-string-fixer
+    - id: end-of-file-fixer
+    - id: mixed-line-ending
+    - id: name-tests-test
+    - id: no-commit-to-branch
+    - id: requirements-txt-fixer
+    - id: trailing-whitespace
+- repo: https://github.com/christophmeissner/pytest-pre-commit
+  rev: 1.0.0
+  hooks:
+  - id: pytest
+    pass_filenames: false
+    always_run: true