Added makeup gain and dry wet mix to DynamicRangeCompressor

[Matt54]

This introduces dedicated gain and dry/wet mix controls for the DynamicRangeCompressor:

• Gain Control: The current compressor only reduces the signal level. In audio applications, it's common to apply makeup gain to compensate for this reduction, bringing the overall signal level back up.
• Dry/Wet Mix Control: This allows for convenient parallel compression, blending the processed (compressed) signal with the unprocessed (dry) signal.

Processing Logic:

• Makeup Gain: Applied only to the processed (compressed) signal.
• Dry/Wet Mix: Computed after the makeup gain is applied.

[aure]

Looks like a bunch of tests are borked, will likely merge and deal with that after.