feat(bench): add common JS pattern benchmarks

feat(bench): add common JS pattern benchmarks

Add 9 new benchmark files for frequently used JS patterns:
- array-iteration: for loop vs for...of vs forEach vs reduce
- string-concatenation: + vs template literal vs concat vs join
- type-checking: typeof vs instanceof vs Array.isArray vs toString
- array-filter: filter() vs for loop vs reduce
- array-find: find() vs findIndex() vs some() vs for loop
- set-vs-array-lookup: Set.has() vs includes() vs indexOf()
- object-iteration: for...in vs Object.keys/values/entries
- number-parsing: parseInt vs Number vs unary + vs bitwise ops
- property-check: in vs hasOwnProperty vs Object.hasOwn vs Reflect.has