Build

refactor: replace bun run with tsx/pnpm across scripts and CI #4643

Job	Run time
Detect Changes	5s
Unit Tests	14s
Lint & Typecheck	13s
Validate generated files	14s
Build npm Package (Node ${{ matrix.node }})	-1s
Build Binary (${{ matrix.target }})	-1s
Generate Delta Patches	0s
CI Status	3s
E2E Tests	0s
Publish Nightly to GHCR	0s
Build Docs	0s
	47s

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