feat: add OCO_ONE_LINE_COMMIT config for enabling one line commit message (#307)

src/prompts.ts

@@ -115,6 +115,11 @@ const INIT_MAIN_PROMPT = (
         ? 'Add a short description of WHY the changes are done after the commit message. Don\'t start it with "This commit", just describe the changes.'
         : "Don't add any descriptions to the commit, only commit message."
     }
+    ${
+      config?.OCO_ONE_LINE_COMMIT
+        ? 'Craft a concise commit message that encapsulates all changes made, with an emphasis on the primary updates. If the modifications share a common theme or scope, mention it succinctly; otherwise, leave the scope out to maintain focus. The goal is to provide a clear and unified overview of the changes in a one single message, without diverging into a list of commit per file change.'
+        : ""
+    }
     Use the present tense. Lines must not be longer than 74 characters. Use ${language} for the commit message.`
 });