feat: add rolldown and rolldown-vite as sub packages #1982

Job	Run time
Lint	1m 57s
Run task	22m 35s
Test (ubuntu-latest, x86_64-unknown-linux-gnu)	1m 37s
Test (windows-latest, x86_64-pc-windows-msvc)	2m 43s
Test (namespace-profile-mac-default, aarch64-apple-darwin)	56s
CLI E2E test (ubuntu-latest)	23m 49s
CLI E2E test (namespace-profile-mac-default)	5m 50s
CLI E2E test (windows-latest)	26m 52s
vite install E2E test	0s
done	4s
	1h 26m 23s

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