Allow launching Claude Code VS Code extension scoped to a specific folder

When working in a large workspace (e.g., an Obsidian vault with many subfolders), it would be useful to launch the Claude Code panel already scoped to a specific subfolder rather than the workspace root.

Suggested approaches:

• Right-click a folder in the Explorer → "Open Claude Code here"
• A setting or launch parameter to specify the working directory
• Automatically detect the folder of the currently active file

Current workaround: Open the subfolder as a separate VS Code workspace, which loses the broader workspace context.