feature/precode (#2)

- Implent support to play precoded files
- Implement a basic client -server architecture

Reviewed-on: https://gitea.pstruebi.xyz/auracaster/bumble-auracast/pulls/2

src/auracast/testdata/encode_lc3.py

@@ -0,0 +1,25 @@
+# use liblc3
+import os
+import subprocess
+
+frame_dur_ms=10
+srate=16000
+bps=32000
+
+if __name__ == '__main__':
+    workdir = os.path.dirname(__file__)
+    os.chdir(workdir)
+    files = os.listdir(workdir)
+    filtered = [file for file in files if file.endswith('.wav')]
+
+    for file in filtered:
+        cmd = [
+            'elc3', 
+            '-b', f'{bps}',
+            '-m', f'{frame_dur_ms}' , 
+            '-r', f'{srate}',
+            f'{file}', f'{file.replace('.wav', '')}_{frame_dur_ms}_{srate//1000}_{bps//1000}.lc3'
+            ]
+        print("Executing: ", " ".join(cmd))
+        ret = subprocess.run(cmd, check=True)
+        print(ret.returncode, ret.stdout, ret.stderr)