[patch] Honest graph properties

[liamhuber]

Right now, practically, the parent-most graph object is the parent-most semantic object is a Node. There is no reason this needs to be so. These changes make it so that (semantic/graph)_(root/path) operate up to the parent-most Semantic and Node objects respectively -- i.e. a "graph" is a semantic tree whose parent-most object is also a Node.

[github-actions[bot]]

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

[codacy-production[bot]]

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Coverage variation	Diff coverage
:white_check_mark: +0.00% (target: -1.00%)	:white_check_mark: 100.00%

Coverage variation details

| | Coverable lines | Covered lines | Coverage | | ------------- | ------------- | ------------- | ------------- | | Common ancestor commit (d461da97603b1c7ada37b0ca7f622a42cc3e2513) | 3296 | 2883 | 87.47% | | | Head commit (adce6ff2a563c27c8933a7372088a3afca5442be) | 3297 (+1) | 2884 (+1) | 87.47% (**+0.00%**) | **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 (#259) | 5 | 5 | **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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