feat(domain): add bullets field to commit result

- Added bullets field to SingleCommitResult interface.
- Improves structure for commit message details.

This change enhances the SingleCommitResult interface by adding a
bullets field, allowing for better organization of commit message
components.

Co-Authored-By: Git Agent <noreply@git-agent.dev>

Author: xesrevinu

src/domain/commit.ts

@@ -39,6 +39,7 @@ export interface CommitPlan {
 
 export interface SingleCommitResult {
   readonly title: string;
+  readonly bullets: ReadonlyArray<string>;
   readonly explanation: string;
   readonly files: ReadonlyArray<string>;
   readonly output: string | undefined;