Introduce ~semantic~ graph path

[liamhuber]

Short term intention: for finding location inside a parent-most storage file (related to #165)

Long term intention: for identification independent of storage location (related to #126)

TODO: (super simple, but I've got to run)

• [x] Attribute docstring
• [x] Unit tests (basically identical in structure to that in #165)

EDIT:

Ok, I reduced the scope just a little. This no longer claims to be the semantic_path -- an object which may or may not contain super-parent-most-node information in the future -- but just the path within the scope of the current graph.

Whether and how we allow the semantic grouping (in contrast to operational grouping where data actually flows automatically) of multiple workflow objects is left to the future. In that hypothetical, the graph_path becomes merely the tail of the semantic_path, but for now we don't close any doors or take any attributes we'd wind up changing the meaning of later!

[github-actions[bot]]

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

[codacy-production[bot]]

Coverage summary from Codacy

See diff coverage on Codacy

Coverage variation	Diff coverage
:white_check_mark: +0.05% (target: -1.00%)	:white_check_mark: 93.75%

Coverage variation details

| | Coverable lines | Covered lines | Coverage | | ------------- | ------------- | ------------- | ------------- | | Common ancestor commit (a08e11baa20ccc3d1b8261a5721a67c4c53240ce) | 2575 | 2198 | 85.36% | | | Head commit (c2ea143b361a05e5df7f96d00f6aa4f9f3b99a0d) | 2591 (+16) | 2213 (+15) | 85.41% (**+0.05%**) | **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 (#167) | 16 | 15 | **93.75%** | **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%`

See your quality gate settings    Change summary preferences

_{You may notice some variations in coverage metrics with the latest Coverage engine update. For more details, visit the documentation}