WIP: refactor(cli): consolidate new `read_and_parse_all_metadata` helper #229

Job	Run time
cargo-deny	20s
Check (ubuntu-latest, stable)	21s
Check (ubuntu-latest, beta)	35s
Clippy (stable)	33s
Check (windows-latest, stable)	33s
Clippy (beta)	35s
Check (windows-latest, beta)	31s
Check (macOS-latest, stable)	1s
Check (macOS-latest, beta)	57s
Rustfmt (stable)	13s
Test Suite (ubuntu-latest, stable)	51s
Test Suite (ubuntu-latest, beta)	48s
Test Suite (windows-latest, stable)	33s
Test Suite (windows-latest, beta)	45s
Test Suite (macOS-latest, stable)	27s
Test Suite (macOS-latest, beta)	24s
	8m 27s

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