feat: add _file suffix to methods interacting with files

[lars-reimann]

Summary of Changes

In Table:

• Rename to_csv to to_csv_file
• Rename to_json to to_json_file
• Rename from_csv to from_csv_file
• Rename from_json to from_json_file
• Rename path_to_file parameters to path

[lars-reimann]

🦙 MegaLinter status: ✅ SUCCESS

Descriptor	Linter	Files	Fixed	Errors	Elapsed time
✅ JSON	eslint-plugin-jsonc	1	0	0	0.82s
✅ JSON	jsonlint	1		0	0.19s
✅ JSON	npm-package-json-lint	yes		no	0.42s
✅ JSON	prettier	1	0	0	0.42s
✅ JSON	v8r	1		0	1.44s
✅ PYTHON	black	39	0	0	1.02s
✅ PYTHON	flake8	39		0	0.7s
✅ PYTHON	isort	39	0	0	0.3s
✅ PYTHON	mypy	39		0	1.96s
✅ PYTHON	pylint	39		0	3.84s
✅ REPOSITORY	git_diff	yes		no	0.02s

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 92.04%. Comparing base (7bad2e3) to head (9d13930).
Report is 511 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #103      +/-   ##
==========================================
- Coverage   92.10%   92.04%   -0.06%     
==========================================
  Files          36       36              
  Lines        1228     1219       -9     
==========================================
- Hits         1131     1122       -9     
  Misses         97       97              

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[lars-reimann]

🎉 This PR is included in version 0.7.0 🎉

The release is available on:

• v0.7.0
• GitHub release

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