Add support for WebRTC Auto Gain and Noise Suppression (#250)

## WebRTC Auto Gain & Noise Suppression
 
This PR adds support for WebRTC Auto Gain and Noise Suppression as previously implemented in the Wyoming Satellite project.
 
### What's New
 
Two new entities have been created a number slider for gain and another one for noise suppression. The processing happens inside of the `webrtc.py` file and is implemented in the `__main__.py` file's `process_audio` function. The slider for gain has a limit of 0-31 and noise suppression has a limit of 0-4.
 
The Auto Gain and Noise Suppression persist through restarts and are saved as preferences. The values are dynamically chnged without needing a restart.
 
CLI flags called `--mic-auto-gain` and `--mic-noise-suppression` have also been added.
 
>  When both values are 0, WebRTC processing is bypassed entirely with no performance overhead.

Closes #25 
 
### Testing
 
When saving the audio recorded by LVA there is a noticeable increase. The following two files have been recorded with similar audio being played through them with these results (Gain-31 and NS-4):
 
| Metric | With AGC+NS | Without |
|---|---|---|
| Max amplitude | 0.329 | 0.054 |
| RMS amplitude | 0.008905 | 0.002862 |
| Volume adjustment needed | 3.034x | 13.479x |
| Rough frequency | 916 Hz | 705 Hz |

pyproject.toml

@@ -32,6 +32,7 @@ dependencies = [
     "zeroconf<1",
     "getmac<1",
     "types-protobuf",
+    "webrtc_noise_gain",
 ]
 dynamic = ["version"]