Commit with GPG Signing

[kics223w1]

Description

Add support for GPG-signed commits.

Ticket

• Commit with GPG Signing - Issue #4

Changelogs

• Implement logic for GPG-signed commits in src/main/services/commit-service.ts.

How to Test

Test Case 1: Verify GPG-Signed Commit Workflow

1. Make changes to one or more files in the project.
2. Navigate to CommitView.
3. Click on the GPG Commit button.
4. Confirm that the GPG Key Input Dialog is displayed.
5. Enter your GPG key when prompted and proceed with the commit process.
6. Verify that the resulting commit is GPG-signed by:
   • Running git log --show-signature in the terminal.
   • Ensuring the commit has a valid GPG signature.