feat: improve audio streaming UI and configuration (#11)

- Renamed "AES67" mode to "Network" for clearer user understanding
- Added structured stream controls with consistent start/stop buttons and status display
- Changed presentation delay input from microseconds to milliseconds for better usability
- Restricted retransmission (RTN) options to valid range of 1-4
- Added help tooltips for assisted listening and immediate rendering options
- Fixed portaudio configuration to enable ALSA support and remove

Co-authored-by: pstruebi <struebin.patrick.com>
Reviewed-on: https://gitea.pstruebi.xyz/auracaster/bumble-auracast/pulls/11

README.md

@@ -170,6 +170,7 @@ option snd_usb_audio nrpacks=1
 sudo apt install -y --no-install-recommends \
         git build-essential cmake pkg-config \
         libasound2-dev libpulse-dev pipewire ethtool linuxptp
+sudo apt remove -y libportaudio2 portaudio19-dev libportaudiocpp0
 
 git clone https://github.com/PortAudio/portaudio.git
 cd portaudio 
@@ -177,7 +178,7 @@ git checkout 9abe5fe7db729280080a0bbc1397a528cd3ce658
 rm -rf build
 cmake -S . -B build -G"Unix Makefiles" \
       -DBUILD_SHARED_LIBS=ON \
-      -DPA_USE_ALSA=OFF \
+      -DPA_USE_ALSA=ON \
       -DPA_USE_PULSEAUDIO=ON \
       -DPA_USE_JACK=OFF
 cmake --build build -j$(nproc)