refactor(ast)!: `oxc_ast` do not export `BigUint` #26254

Job	Run time
Build Linter Benchmark	2m 43s
Benchmark (lexer)	1m 30s
Benchmark (parser)	1m 33s
Benchmark (transformer)	2m 5s
Benchmark (isolated_declarations)	1m 56s
Benchmark (semantic)	1m 32s
Benchmark (minifier)	2m 13s
Benchmark (codegen)	1m 59s
Benchmark linter (0)	3m 1s
Benchmark linter (1)	1m 35s
Upload benchmarks	13s
	20m 20s

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