Make DirectoryObject recognize various init variables

[samwaseda]

I think it's straightforward enough, but this PR is to make DirectoryObject recognise str, Path and DirectoryObject for the directory instantiation.

I guess this is the first one to be merged. Sorry for going back and forth all the time!

[github-actions[bot]]

:point_left: Launch a binder notebook on branch _pyiron/pyiron_workflow/file_directory_of_directoryobject

[codacy-production[bot]]

Coverage summary from Codacy

See diff coverage on Codacy

Coverage variation	Diff coverage
:white_check_mark: +0.03% (target: -1.00%)	:white_check_mark: 100.00%

Coverage variation details

| | Coverable lines | Covered lines | Coverage | | ------------- | ------------- | ------------- | ------------- | | Common ancestor commit (7fcae5f00f9873a1f5e35301c4aedb8ab5e1aaf5) | 3065 | 2659 | 86.75% | | | Head commit (6c1c6f0cfcf77f3e1de7b752d0ab6e14da7425e8) | 3071 (+6) | 2665 (+6) | 86.78% (**+0.03%**) | **Coverage variation** is the difference between the coverage for the head and common ancestor commits of the pull request branch: ` - `

Diff coverage details

| | Coverable lines | Covered lines | Diff coverage | | ------------- | ------------- | ------------- | ------------- | | Pull request (#216) | 8 | 8 | **100.00%** | **Diff coverage** is the percentage of lines that are covered by tests out of the coverable lines that the pull request added or modified: `/ * 100%`

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[coveralls]

Pull Request Test Coverage Report for Build 7970400900

Details

• 0 of 8 (100.0%) changed or added relevant lines in 1 file are covered.
• 4 unchanged lines in 1 file lost coverage.
• Overall coverage increased (+0.02%) to 91.207%

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Files with Coverage Reduction	New Missed Lines	%
snippets/files.py	4	93.59%
<!--	Total:	4		-->

Totals
Change from base Build 7939797536:	0.02%
Covered Lines:	5705
Relevant Lines:	6255

---

💛 - Coveralls

[samwaseda]

@liamhuber I made this project to make a better overview. Hopefully it helps a bit.

[samwaseda]

Since the distinction won't be needed if DirectoryObject is derived from Path, I close this PR.