Add `LICENSE` to source distribution

[moritzsommer]

Current Situation

In the current setup, the LICENSE file is not added to the source distribution of this SDK.

Executing the job from the CI locally results in a /dist folder containing no LICENSE. I tested this with both CMD and WSL:

basyx-python-sdk/.github/workflows/release.yml

Lines 7 to 29 in bdbfdcc

	jobs:
	sdk-publish:
	# This job publishes the SDK package to PyPI
	runs-on: ubuntu-latest
	defaults:
	run:
	working-directory: ./sdk
	steps:
	- uses: actions/checkout@v4
	- name: Set up Python 3.10
	uses: actions/setup-python@v5
	with:
	python-version: "3.10"
	- name: Install dependencies
	run: |
	python -m pip install --upgrade pip
	pip install build
	- name: Create source and wheel dist
	# (2024-12-11, s-heppner)
	# The PyPI Action expects the dist files in a toplevel `/dist` directory,
	# so we have to specify this as output directory here.
	run: |
	python -m build --outdir ../dist

Proposed Change

Add a LICENSE to every subdirectory with a pyproject.toml that functions as its own package, i.e. compliance_tool and sdk. Alternatively, we could adapt the CI to copy the LICENSE into the subdirectory every time we publish a new release.