feat(project): add command to close issues

[duizendstra]

Summary

This is a feature request to add a new command to the contextvibes CLI for closing GitHub issues, mirroring the functionality of gh issue close.

Problem Statement

Currently, the contextvibes CLI provides high-level wrappers for many daily workflow tasks, such as kickoff, commit, and finish. However, when a developer needs to close an issue that has been resolved (for example, a duplicate or an issue resolved by a different PR), they must drop out of the contextvibes workflow and use the lower-level gh command directly (gh issue close <number>).

This creates an inconsistency in the user experience and forces a context switch away from our primary command interface.

Proposed Solution

Introduce a new command, structured similarly to the existing factory or a new project pillar command. A logical structure would be:

contextvibes project issue close <issue-number> [--comment "An optional closing comment."]

This command would act as a direct wrapper around the gh issue close <issue-number> --comment "..." command, providing the same functionality within our standardized toolchain.

Benefits

• Consistent Workflow: Keeps developers within the contextvibes ecosystem for all standard repository interactions.
• Reduced Cognitive Load: Developers would not need to remember the specific gh syntax, as it would be handled by our high-level API.
• Completes the Issue Lifecycle: Complements the finish command by providing a tool to manage the full lifecycle of an issue within the CLI.

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Context

• CLI Version: dev
• OS/Arch: linux/amd64
• Filed by: @duizendstra