refactor(ast)!: `oxc_ast` do not export `BigUint` #26268

Job	Run time
Benchmark (lexer)	1m 15s
Build Linter Benchmark	2m 47s
Benchmark (parser)	1m 46s
Benchmark (transformer)	2m 26s
Benchmark (isolated_declarations)	2m 8s
Benchmark (semantic)	1m 34s
Benchmark (minifier)	2m 25s
Benchmark (codegen)	2m 2s
Benchmark linter (0)	3m 14s
Benchmark linter (1)	1m 49s
Upload benchmarks	16s
	21m 42s

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