Implement sample selection and management features in sequencer

Commit notes

- Added `SampleSelectorPopover` component for selecting samples, allowing users to search and preview audio samples. - Integrated sample selection functionality into the `SequencerTrack` component, enabling users to replace track samples with selected ones. - Enhanced `SampleManagementProvider` to support sample replacement, ensuring proper audio context handling and state updates. - Updated `GainMeter` to conditionally hide track names based on new props, improving UI flexibility.

This commit aims to enhance the user experience in the sequencer by providing robust sample management and selection capabilities.