Add scan stats: file count and duration in terminal output #80

Job	Run time
Build Release (macos-latest)	23s
Clippy (ubuntu-latest)	11s
Test (macos-latest)	27s
Build Release (ubuntu-latest)	23s
Format	7s
Clippy (macos-latest)	15s
Test (ubuntu-latest)	15s
Distribution (npm) (ubuntu-latest)	40s
Distribution (cargo install)	51s
Dogfood (foxguard scans itself)	26s
Distribution (npm) (macos-latest)	42s
	4m 40s

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