[FEATURE] Can the --from-pr flag be replicated for gitlab? like a --from-mr

Preflight Checklist

• [x] I have searched existing requests and this feature hasn't been requested yet
• [x] This is a single feature request (not multiple features)

Problem Statement

Recently added --from-pr flag to resume sessions linked to a specific GitHub PR number or URL. Would love that feature but for gitlab via merge requests.

Proposed Solution

Recently added --from-pr flag to resume sessions linked to a specific GitHub PR number or URL. Would love that feature but for gitlab via merge requests.

Alternative Solutions

_No response_

Priority

Critical - Blocking my work

Feature Category

CLI commands and flags

Use Case Example

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Additional Context

_No response_