fix: fixed audio filter chaining and add Vitest for unit testing (magic-peach#440)

* fix: fixed audio filter chaining and add Vitest for unit testing

* test: migrate testing framework from bun:test to vitest

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Co-authored-by: Akanksha Trehun <146705736+magic-peach@users.noreply.github.com>

Author: Shivansh181003