feat: move plotting methods into Column and Table classes

[lars-reimann]

Closes #62.

Summary of Changes

• Move plotting methods into Column and Table classes since they are specific to these classes. We don't want to create a generic plotting library.
• Remove the plotting module.

[lars-reimann]

🦙 MegaLinter status: ✅ SUCCESS

Descriptor	Linter	Files	Fixed	Errors	Elapsed time
✅ PYTHON	black	7	0	0	1.09s
✅ PYTHON	flake8	7		0	0.65s
✅ PYTHON	isort	7	0	0	0.32s
✅ PYTHON	mypy	7		0	2.65s
✅ PYTHON	pylint	7		0	4.19s
✅ REPOSITORY	git_diff	yes		no	0.03s

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[codecov]

Codecov Report

Merging #88 (6b371ef) into main (15999b5) will decrease coverage by 0.15%.
The diff coverage is 94.00%.

❗ Current head 6b371ef differs from pull request most recent head 74e6c71. Consider uploading reports for the commit 74e6c71 to get more accurate results

@@            Coverage Diff             @@
##             main      #88      +/-   ##
==========================================
- Coverage   91.68%   91.53%   -0.15%     
==========================================
  Files          42       36       -6     
  Lines        1154     1134      -20     
==========================================
- Hits         1058     1038      -20     
  Misses         96       96              

Impacted Files	Coverage Δ
src/safeds/data/tabular/containers/_table.py	91.48% <93.54%> (+0.22%)	⬆️
src/safeds/data/tabular/containers/_column.py	90.14% <94.73%> (+0.70%)	⬆️

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[lars-reimann]

🎉 This PR is included in version 0.5.0 🎉

The release is available on:

• v0.5.0
• GitHub release

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