feat: add commit --fixup option to Repositories view

Add support for git commit --fixup in the Repositories view,
allowing users to create fixup commits for interactive rebasing.

Author: AndyBodnar

src/env/node/git/sub-providers/operations.ts

@@ -402,3 +402,16 @@ export class OperationsGitSubProvider implements GitOperationsSubProvider {
 		}
 	}
 }
+
+	@log()
+	async commitFixup(repoPath: string, ref: string): Promise<void> {
+		const scope = getLogScope();
+
+		try {
+			await this.git.exec({ cwd: repoPath, errors: GitErrorHandling.Throw }, 'commit', '--fixup', ref);
+			this.container.events.fire('git:cache:reset', { repoPath: repoPath, types: ['status'] });
+		} catch (ex) {
+			Logger.error(ex, scope);
+			throw ex;
+		}
+	}

src/git/gitProvider.ts

@@ -439,6 +439,7 @@ export interface GitOperationsSubProvider {
 		options?: { mode?: 'hard' | 'keep' | 'merge' | 'mixed' | 'soft' },
 	): Promise<void>;
 	revert(repoPath: string, refs: string[], options?: { editMessage?: boolean }): Promise<void>;
+	commitFixup?(repoPath: string, ref: string): Promise<void>;
 }
 
 export interface GitPausedOperationsSubProvider {