feat: Add disk usage percentage and warn on high usage #132

Job	Run time
Run Cargo Deny (advisories)	40s
Run RustDoc	3m 44s
Run Cargo Udeps	1m 21s
Run Cargo Deny (bans licenses sources)	41s
Run Rustfmt	15s
Run Clippy	39s
Run Cargo Tests	26s
All tests passed	2s
	7m 48s

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