feat: discover uv-managed global Python installations #84

Job	Run time
E2E Performance Tests (macos-latest, x86_64-apple-darwin)	7m 22s
E2E Performance Tests (ubuntu-latest, x86_64-unknown-linux-musl)	3m 28s
E2E Performance Tests (windows-latest, x86_64-pc-windows-msvc)	6m 51s
	17m 41s

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