ENH: add search term for retrieving Entries that are nested under an ancestor #247

Job	Run time
standard / Documentation / Python 3.9: documentation building	34s
standard / pre-commit checks / pre-commit	18s
standard / Conda (3.10) / Python 3.10: conda	3m 0s
standard / Conda (3.12, true) / Python 3.12: conda	2m 54s
standard / Conda (3.11, true) / Python 3.11: conda	2m 55s
standard / Conda (3.9, true) / Python 3.9: conda	3m 1s
standard / Pip (3.10) / Python 3.10: pip	1m 20s
standard / Pip (3.11, true) / Python 3.11: pip	1m 10s
standard / Pip (3.12, true) / Python 3.12: pip	1m 17s
standard / Pip (3.9, true) / Python 3.9: pip	1m 9s
standard / Documentation / Documentation deployment	0s
	17m 38s

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