refactor: make audio mandatory and split iced app modules

scripts/check-audio-podman.sh

@@ -0,0 +1,16 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+
+SCRIPT_DIR="$(dirname "$(readlink -f "$0")")"
+REPO_ROOT="$(readlink -f "$SCRIPT_DIR/..")"
+
+IMAGE="${RETEAMSPEAK_AUDIO_IMAGE:-docker.io/library/rust:1.91-bookworm}"
+
+podman run --rm \
+  -v "$REPO_ROOT:/workspace:Z" \
+  -w /workspace/src \
+  "$IMAGE" \
+  bash -lc "apt-get update >/dev/null && \
+    apt-get install -y --no-install-recommends cmake pkg-config libasound2-dev libopus-dev >/dev/null && \
+    /usr/local/cargo/bin/cargo check -p re-teamspeak"