feat: Use Rolldown native `MagicString` #1876

Job	Run time
Formatting check	20s
Build packages	54s
Typing check	1m 42s
Unit Tests	40s
Linter check	1m 19s
Integration Tests (Node 18, OS ubuntu-latest)	2m 3s
Integration Tests (Node 16, OS ubuntu-latest)	2m 36s
Integration Tests (Node 18, OS windows-latest)	1m 16s
Integration Tests (Node 22, OS ubuntu-latest)	1m 51s
Integration Tests (Node 22, OS windows-latest)	1m 11s
Integration Tests (Node 14, OS ubuntu-latest)	2m 35s
Integration Tests (Node 14, OS windows-latest)	1m 26s
Integration Tests (Node 20, OS ubuntu-latest)	1m 54s
Integration Tests (Node 16, OS windows-latest)	1m 32s
Integration Tests (Node 20, OS windows-latest)	1m 15s
Upload Artifacts	-1s
E2E Tests	-1s
	22m 32s

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