Bundle Bootstrap JS file and remove dependency XStatic-Bootstrap

[roland-ruedenauer]

This should fix the CI build issues seen on 2 current PRs.

This error occurs for all the Python environments the GitHub CI runs pytest on:

Collecting XStatic-Bootstrap<=5.3.8.0,>=5.3.8.0 (from moin==0.1.dev1+ga9c5bd4b0.d20260208)
  Downloading xstatic_bootstrap-5.3.8.0.tar.gz (1.5 MB)
     ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 1.5/1.5 MB 57.0 MB/s  0:00:00
  Installing build dependencies: started
  Installing build dependencies: finished with status 'done'
  Getting requirements to build wheel: started
  Getting requirements to build wheel: finished with status 'error'
  error: subprocess-exited-with-error
  
  × Getting requirements to build wheel did not run successfully.
  │ exit code: 1
  ╰─> [26 lines of output]
      Traceback (most recent call last):
        File "/opt/hostedtoolcache/Python/3.14.2/x64/lib/python3.14/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", line 389, in <module>
          main()
          ~~~~^^
        File "/opt/hostedtoolcache/Python/3.14.2/x64/lib/python3.14/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", line 373, in main
          json_out["return_val"] = hook(**hook_input["kwargs"])
                                   ~~~~^^^^^^^^^^^^^^^^^^^^^^^^
        File "/opt/hostedtoolcache/Python/3.14.2/x64/lib/python3.14/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", line 143, in get_requires_for_build_wheel
          return hook(config_settings)
        File "/tmp/pip-build-env-mbll5hiz/overlay/lib/python3.14/site-packages/setuptools/build_meta.py", line 333, in get_requires_for_build_wheel
          return self._get_build_requires(config_settings, requirements=[])
                 ~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
        File "/tmp/pip-build-env-mbll5hiz/overlay/lib/python3.14/site-packages/setuptools/build_meta.py", line 301, in _get_build_requires
          self.run_setup()
          ~~~~~~~~~~~~~~^^
        File "/tmp/pip-build-env-mbll5hiz/overlay/lib/python3.14/site-packages/setuptools/build_meta.py", line 520, in run_setup
          super().run_setup(setup_script=setup_script)
          ~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^
        File "/tmp/pip-build-env-mbll5hiz/overlay/lib/python3.14/site-packages/setuptools/build_meta.py", line 317, in run_setup
          exec(code, locals())
          ~~~~^^^^^^^^^^^^^^^^
        File "<string>", line 1, in <module>
        File "/tmp/pip-install-9qxcau34/xstatic-bootstrap_1fc3e38b9f054cc3ab9e445f1e9f895d/xstatic/__init__.py", line 1, in <module>
          __import__('pkg_resources').declare_namespace(__name__)
          ~~~~~~~~~~^^^^^^^^^^^^^^^^^
      ModuleNotFoundError: No module named 'pkg_resources'
      [end of output]
  
  note: This error originates from a subprocess, and is likely not a problem with pip.
ERROR: Failed to build 'XStatic-Bootstrap' when getting requirements to build wheel
Error: Process completed with exit code 1.

[ThomasWaldmann]

The root cause:

pypa/setuptools#5007 (comment)

So setuptools<82 instead of bundling all the 3rd party stuff.

[roland-ruedenauer]

The main reason:

After years of developing suitable replacements in importlib.resources and importlib.metadata, Setuptools is now prepared to retire the pkg_resources module.