refactor: adjust global structure (part 1)

[lars-reimann]

Summary of Changes

First batch of structural changes to reuse the Safe-DS code for TTSL.

[github-actions]

🦙 MegaLinter status: ✅ SUCCESS

Descriptor	Linter	Files	Fixed	Errors	Elapsed time
✅ CSS	stylelint	3	0	0	1.76s
✅ JAVASCRIPT	eslint	1	0	0	6.92s
✅ JAVASCRIPT	prettier	1	0	0	0.45s
✅ JSON	eslint-plugin-jsonc	19	0	0	2.43s
✅ JSON	jsonlint	19		0	0.38s
✅ JSON	npm-package-json-lint	yes		no	0.74s
✅ JSON	prettier	22	0	0	1.97s
✅ JSON	v8r	19		0	22.72s
✅ MARKDOWN	markdown-link-check	6		0	1.27s
✅ PYTHON	black	2	0	0	0.83s
✅ PYTHON	mypy	2		0	2.89s
✅ PYTHON	ruff	2	0	0	0.09s
✅ REPOSITORY	git_diff	yes		no	0.1s
✅ TYPESCRIPT	eslint	182	0	0	12.7s
✅ TYPESCRIPT	prettier	182	0	0	5.67s
✅ YAML	prettier	1	0	0	0.55s
✅ YAML	v8r	1		0	3.99s
✅ YAML	yamllint	1		0	0.33s

See detailed report in MegaLinter reports
Set VALIDATE_ALL_CODEBASE: true in mega-linter.yml to validate all sources, not only the diff

MegaLinter is graciously provided by