🟡 HIGH: Add merge-pull-request.sh tool for PR merging with branch cleanup

[isaaceliape]

Feature Request

Description

Create a new tool script that automates pull request merging and source branch deletion

Motivation

Why is this feature needed?

Expected Behavior

What should happen when this feature is implemented?

Acceptance Criteria

• Tool should merge a PR with squash strategy and automatically delete the source branch after successful merge

Implementation Details

• Implementation approach
• Dependencies
• Affected components

[isaaceliape]

Closed: Completed - merge-pull-request.sh tool implemented in PR #37