Refactor WebRenderer to use server-side streaming with OGG-FLAC sink

This commit refactors the WebRenderer to use a server-side streaming architecture with OGG-FLAC sink instead of the previous WebSocket-based approach. The changes include:

- Replaced WebSocket communication with HTTP streaming using DirectOggFlacSink
- Implemented a new pipeline architecture with dedicated handlers for UPnP commands
- Added new modules for registration, registry, and streaming
- Updated the renderer to work with a pipeline control system
- Removed old WebSocket session management
- Added support for HTTP streaming with gapless playback
- Updated dependencies and features for the new architecture

The WebRenderer now acts as a MediaRenderer UPnP device that serves audio streams via HTTP endpoints, with commands relayed to the audio pipeline through a new control system.

pmoaudio-ext/Cargo.toml

@@ -30,10 +30,12 @@ rand = "0.8"
 bytes = { version = "1.0", optional = true }
 serde = { workspace = true, optional = true }
 serde_json = { workspace = true, optional = true }
+reqwest = { workspace = true, features = ["stream"], optional = true }
+futures = { version = "0.3", optional = true }
 
 [features]
 default = []
 cache-sink = ["dep:pmoaudiocache", "dep:pmoflac", "dep:pmometadata", "dep:serde_json"]
 playlist = ["cache-sink", "dep:pmoplaylist", "dep:pmocache"]
-http-stream = ["dep:pmoflac", "dep:pmometadata", "dep:bytes", "dep:serde"]
+http-stream = ["dep:pmoflac", "dep:pmometadata", "dep:bytes", "dep:serde", "dep:reqwest", "dep:futures"]
 all = ["cache-sink", "playlist", "http-stream"]