fix(js): fixed caching performance issues

[eric-zaharia]

Reduces localStorage blocking in createBrowserLocalStorageCache to improve INP by merging two filter passes into one (cutting get() from 2 reads + 2 writes to 1 read + 1 write) and creating new macrotasks (instead of waiting for the microtask queue to finish synchronously) via setTimeout before heavy work in get(), set(), and delete().

[Haroenv]

I doubt this is the only inefficient promise-related code, but if it works for your use case, lgtm. I personally would add tests and compare with v5 though