vendor: add summary output for crates vendored#16646

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raushan728 wants to merge 3 commits intorust-lang:masterfrom

raushan728:feature/vendor-summary-output

Commits on Feb 15, 2026

feat: `cargo vendor` now reports the number of vendored crates in its summary output.
raushan728
committed
test: refine stderr assertion for cargo vendor --respect-source-config output
raushan728
committed
fix: only display the "Vendored" status message when crates are actually vendored.
raushan728
committed