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/ha/sign-path.ts

@@ -1,6 +1,6 @@
 import { SignedPath, signedPathSchema } from '../types';
-import { HomeAssistant } from './types';
 import { homeAssistantWSRequest } from './ws-request';
+import { HomeAssistant } from './types';
 
 /**
  * Request that HA sign a path. May throw.
@@ -10,7 +10,6 @@ import { homeAssistantWSRequest } from './ws-request';
  * HA will sign for 30 seconds).
  * @returns The signed URL, or null if the response was malformed.
  */
-
 export async function homeAssistantSignPath(
   hass: HomeAssistant,
   path: string,