Modernise build tooling: Python 3.11, setuptools-scm, mise

- Replace better-setuptools-git-version (broken on Python 3.10+) with
  setuptools-scm
- Bump python_requires to >=3.11 and update classifiers to match
- Update CI workflows (python-package, python-publish) to Python 3.11
- Switch from direnv (.envrc) to mise (.mise.toml) for local tooling

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: rnorth

.envrc

@@ -17,7 +17,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: [3.7, 3.8]
+        python-version: ["3.11"]
 
     steps:
     - uses: actions/checkout@v2

.github/workflows/python-package.yml

@@ -17,7 +17,7 @@ jobs:
     - name: Set up Python
       uses: actions/setup-python@v2
       with:
-        python-version: '3.8'
+        python-version: '3.11'
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip

.github/workflows/python-publish.yml

@@ -0,0 +1,5 @@
+[tools]
+python = "3.11"
+
+[env]
+_.python.venv = { path = ".venv", create = true }

.mise.toml

@@ -10,10 +10,7 @@ def read_file(fname):
 
 setup(
     name='mkdocs-codeinclude-plugin',
-    version_config={
-        "version_format": "{tag}.dev{sha}",
-        "starting_version": "0.2.0"
-    },
+    use_scm_version=True,
     description="A plugin to include code snippets into mkdocs pages",
     long_description=read_file('README.md'),
     long_description_content_type='text/markdown',
@@ -22,19 +19,19 @@ def read_file(fname):
     author='Richard North',
     author_email='rich.north@gmail.com',
     license='MIT',
-    python_requires='>=3.7',
+    python_requires='>=3.11',
     install_requires=[
         'mkdocs>=1.2',
         'pygments>=2.9.0'
     ],
-    setup_requires=['better-setuptools-git-version'],
+    setup_requires=['setuptools-scm'],
     classifiers=[
         'Intended Audience :: Developers',
         'Intended Audience :: Information Technology',
         'License :: OSI Approved :: MIT License',
         'Programming Language :: Python',
         'Programming Language :: Python :: 3 :: Only',
-        'Programming Language :: Python :: 3.6',
+        'Programming Language :: Python :: 3.11',
     ],
     packages=['codeinclude'],
     include_package_data=True,