chore: migrate tox.ini to pyproject.toml (#2289)

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit

- **New Features**
- Enhanced testing capabilities with new Tox configurations for multiple
Python versions (3.7 to 3.13) and added support for documentation
generation.

- **Bug Fixes**
- Improved workflow concurrency settings for better management of test
runs.

- **Documentation**
- Updated dependencies and commands for coverage reporting and type
checking.

- **Chores**
	- Removed the outdated `tox.ini` file to streamline configuration.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

.github/workflows/push.yml

@@ -22,7 +22,7 @@ jobs:
       with:
         python-version: '3.11'
         architecture: 'x64'
-    - run: pip install tox tox-gh-actions tox-uv
+    - run: pip install tox tox-gh tox-uv
     - run: tox
     - uses: codecov/codecov-action@v4
       with:

pyproject.toml

@@ -173,3 +173,66 @@ ignore = [
 
 [tool.ruff.pydocstyle]
 convention = "numpy"
+
+[tool.tox]
+requires = ["tox>=4.19"]
+env_list = [
+    "3.13",
+    "3.12",
+    "3.11",
+    "3.10",
+    "3.9",
+    "3.8",
+    "3.7",
+    "docs",
+]
+
+[tool.tox.env_run_base]
+description = "Run test under {base_python}"
+package = "editable"
+extras = [
+    "test",
+]
+pass_env = [
+    "CI",
+    "CODACY_*",
+    "CODECOV_*",
+    "GITHUB_*",
+    "TOXENV",
+]
+set_env = { DEBUG = "1" }
+commands = [[
+    "pytest",
+    "--pyargs",
+    "tests",
+    "--cov",
+    "--cov-report",
+    "term",
+    "--cov-report",
+    "xml",
+    "--cov-config={toxinidir}/pyproject.toml"
+]]
+
+[tool.tox.env.docs]
+description = "invoke sphinx-build to build the HTML docs"
+extras = [
+    "docs",
+]
+commands = [[
+    "make",
+    "-C",
+    "{toxinidir}/docs",
+    "html"
+]]
+allowlist_externals = [
+    "make",
+]
+
+[tool.tox.gh.python]
+"3.13" = ["3.13"]
+"3.12" = ["3.12"]
+"3.11" = ["3.11"]
+"3.10" = ["3.10"]
+"3.9" = ["3.9"]
+"3.8" = ["3.8"]
+"3.7" = ["3.7"]