WIP: refactor(cli): consolidate new `read_and_parse_all_metadata` helper #200

Job	Run time
cargo-deny	22s
Check (ubuntu-latest, stable)	35s
Check (ubuntu-latest, beta)	32s
Clippy (stable)	35s
Check (windows-latest, stable)	9s
Check (windows-latest, beta)	17s
Clippy (beta)	35s
Rustfmt (stable)	13s
Check (macOS-latest, stable)	1s
Test Suite (ubuntu-latest, stable)	43s
Check (macOS-latest, beta)	55s
Test Suite (ubuntu-latest, beta)	43s
Test Suite (windows-latest, stable)	49s
Test Suite (windows-latest, beta)	56s
Test Suite (macOS-latest, stable)	27s
Test Suite (macOS-latest, beta)	35s
	8m 27s

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