chore: Add Flake8 configuration and remove unused torch import from model.py.

Author: rajjitlai

.flake8

@@ -0,0 +1,11 @@
+[flake8]
+max-line-length = 88
+extend-ignore = E203, W503
+exclude =
+    .git,
+    __pycache__,
+    venv,
+    .venv,
+    build,
+    dist,
+    *.egg-info

model.py

@@ -1,5 +1,4 @@
 import soundfile as sf
-import torch
 from qwen_tts import Qwen3TTSModel
 
 from config import DEVICE, DTYPE, HF_TOKEN, MODEL_ID, USE_FLASH_ATTN

runner.py

@@ -26,7 +26,7 @@ def pick_reference_audio() -> str:
 
     if not files:
         print(f"❌ No audio files found in '{REFERENCE_AUDIO_DIR}/'.")
-        print(f"   Drop a .wav or .mp3 file there and re-run.\n")
+        print("   Drop a .wav or .mp3 file there and re-run.\n")
         exit(1)
 
     print("📂 Reference audio files available:")