chore: tsdown dual build #6738

Job	Run time
Linter	52s
Format check	53s
Unit tests (macos-latest)	1m 31s
Unit tests (ubuntu-latest)	1m 24s
Build	54s
Integration tests (macos-latest)	2m 13s
Integration tests (windows-latest)	4m 17s
Integration tests (ubuntu-latest)	2m 0s
E2E tests (macos-latest)	1m 58s
E2E tests (windows-latest)	3m 56s
E2E tests (ubuntu-latest)	1m 47s
Unit tests (windows-latest)	3m 30s
	25m 15s

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