Feature Request: Keyboard shortcut to reference folders in chat (like Option+K for files)

Problem

Currently, Option+K (Mac) allows users to quickly add a file reference in the chat input. However, there's no equivalent shortcut to reference an entire folder/directory.

Use Case

When asking Claude to analyze or work with a specific directory, users currently have to either type the path manually or reference files one by one. This is inconvenient when the context of an entire folder is needed.

Proposed Solution

Add a keyboard shortcut (e.g., Option+Shift+K or similar) to open a folder picker and add a folder reference to the chat input, similar to how Option+K works for files.

Expected Behavior

1. User presses the shortcut (e.g., Option+Shift+K on Mac)
2. A folder picker dialog opens (or a quick-pick list of directories)
3. User selects a folder
4. A folder reference (e.g., @Work/PKG/nightowl/) is inserted into the chat input

Environment

• OS: macOS
• Tool: Claude Code VSCode Extension