transcription: split out transcription task into separate module

src/scene.rs

@@ -1,10 +1,8 @@
 use async_openai::types::chat::*;
 use chrono::Duration;
-use crossterm::event::MediaKeyCode::Play;
 use schemars::schema_for;
 use serde::{Deserialize, Serialize};
 use serde_json::Value;
-use sqlite::OpenFlags;
 
 use crate::GeneratedResponses;