ci: Use Blacksmith runners for all CI jobs #18

Job	Run time
Security Audit	1m 4s
Build Check (blacksmith-4vcpu-windows-2025)	58s
Format	15s
Clippy	53s
Build Check (blacksmith-4vcpu-ubuntu-2404)	1m 15s
Test (blacksmith-4vcpu-ubuntu-2404)	1m 49s
Test (blacksmith-2vcpu-macos-14)	1s
Test (blacksmith-4vcpu-windows-2025)	2m 59s
Build Check (blacksmith-2vcpu-macos-14)	1d 0h 0m 1s
	1d 0h 9m 15s

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