[Feature]: agent-governance for vscode agentic development

### Package

New package / cross-cutting

### Problem Statement

current packages does not cover github copilot or other agentic development tools in vscode. there are packages for copilot cli and other agentic development harnesses tho.

### Proposed Solution

creating vscode extension that wraps the feature of current agt for copilot cli and other agentic tools like claude etc.

### Alternatives Considered

_No response_

### Priority

Important

### Contribution

- [ ] I would be willing to submit a PR for this feature

Start by reviewing the existing packages for Copilot CLI and other agentic harnesses, then compare their governance interfaces with the proposed VS Code extension. Clarify which VS Code, Copilot, and Claude capabilities are in scope and how the extension should wrap them. Done should include an agreed package boundary and acceptance criteria for this cross-cutting feature.

Written by the indexing model from the issue text.