feat(voice): replaced miniaudio with native platform audio backends

- Replaced the miniaudio dependency with custom OS audio device abstractions and backends.
- Implemented platform-specific audio playback and capture for macOS (Audio Queue), Windows (WASAPI), and Linux (PulseAudio/ALSA).
- Added a fallback stub backend returning errors for unsupported platforms.
- Updated audio stream handling with reliable fill guard wakeups and streamlined rate validation.

MODULE.bazel

@@ -199,17 +199,6 @@ crate.annotation(
     build_script_env = {"CFLAGS": "-UNDEBUG"},
 )
 
-# `generate-bindings` is enabled for darwin so miniaudio's Rust bindings match
-# its CoreAudio C layout. Build scripts execute for the host, however, so a
-# macOS-hosted Linux cross-build also sees that feature. Use Cargo's TARGET to
-# keep bindgen darwin-only and select checked GNU/musl bindings by compilation
-# target, including ARM64's larger glibc pthread layouts.
-crate.annotation(
-    crate = "maudio-sys",
-    patches = ["//bazel/patches:maudio-sys-target-bindings.patch"],
-    patch_args = ["-p1"],
-)
-
 use_repo(crate, "crates")