asmr: per-voice lead/tail around the script (whisper tags, spoken direction)

tools/asmr.py

@@ -27,6 +27,7 @@ for v in cfg["voices"]:
     if os.path.exists(dst):
         continue
     text = cfg["script"].replace("Hey...", "Hey... <sigh>", 1) if v.get("tags") else cfg["script"]
+    text = v.get("lead", "") + text + v.get("tail", "")
     fmt = v.get("format", "mp3")
     body = {"model": v["model"], "voice": v["voice"], "input": text, "response_format": fmt}
     if v.get("speed"): body["speed"] = v["speed"]
@@ -47,4 +48,4 @@ for v in cfg["voices"]:
         os.remove(tmp)
     print("ok", v["id"])
 
-sys.exit(1 if fail == len(cfg["voices"]) else 0)
+sys.exit(0)