fix: Improve 2-way audio detection (#2293)

- For Frigate cameras, you must be running at least [integration
v5.12.0](https://github.com/blakeblackshear/frigate-hass-integration/releases/tag/v5.12.0).
 - Closes: #2191 

Includes a significant refactor of cameras, and the introduction of a
`2-way-audio` capability that is dynamically fetched from `go2rtc`. One
gotcha is if you previously had a substream with 2-way audio, you may
need to modify

```yaml
 - camera_entity: camera.foo
    capabilities:
      disable_except:
        - substream
```

... to ...

```yaml
 - camera_entity: camera.foo
    capabilities:
      disable_except:
        - substream
        - 2-way-audio
```

src/types.ts

@@ -15,9 +15,14 @@ export class AdvancedCameraCardError extends Error {
 }
 
 export interface MediaLoadedCapabilities {
-  supports2WayAudio?: boolean;
   supportsPause?: boolean;
+
   hasAudio?: boolean;
+
+  // Note: This is whether the current stream already _has_ 2-way audio, not
+  // whether the underlying camera _could_ establish 2 way audio. For the
+  // latter, consult the camera's capabilities ('2-way-audio').
+  has2WayAudio?: boolean;
 }
 
 export type MediaTechnology =
@@ -132,6 +137,8 @@ export interface CapabilitiesRaw {
   menu?: boolean;
 
   trigger?: boolean;
+
+  '2-way-audio'?: boolean;
 }
 
 export type CapabilityKey = keyof CapabilitiesRaw;
@@ -147,6 +154,7 @@ export const capabilityKeys: readonly [CapabilityKey, ...CapabilityKey[]] = [
   'seek',
   'snapshots',
   'substream',
+  '2-way-audio',
   'trigger',
 ] as const;