Feature player filter

[kashiken]

This PR introduces a filter function for the player.

Purpose of Change

• To allow the user to preview the audio more precisely.
  • For audio recording use cases, the user can focus on or remove unwanted noise.
  • For music listening use cases, the user can focus on a specific instrument or vocal.

Changes

• Added bi-quad filters for playback audio path.
  • The added filters are only inserted into the path when enabled.
• Added PlayerSettingsComponent to set the filter enable and the cutoff frequencies.
  • The user can enable the high-pass and low-pass filters individually.
  • The user can also set the cutoff frequencies.
  • By selecting the "match to spectrogram frequency range" option, the cutoff frequencies automatically match the analyzer frequency range.
    • The user can select the frequency range to preview visually by selecting a range on the spectrogram.

Tests

• I've confirmed the changes visually, and tested the UI operations as well.
• Some tests have been added to test the new component and settings.
• The changes conform to all existing tests.

Notes

• This PR includes the fix of const declaration which I was mentioned in #57.
• I replaced some "playerSettingService" to "playerSettingsService" for consistency.