[Feature]: Run ide or any ai tools inside orca

### Problem or use case

Orca supports a wide range of CLI-based coding agents and includes a built-in editor and terminal, but there's no way to launch or work inside a full external IDE (like Zed) or other desktop apps (like OpenCode Desktop or other AI tools) from within Orca itself. Users who prefer a specific editor's keybindings, plugins, or extensions have to leave Orca entirely and manage a separate window, which breaks the single-pane workflow Orca is built around. This is different from the existing "Computer Use" feature, which lets agents drive desktop apps — this is about letting the user open and work in an external IDE/app inside Orca's own workspace.

### Proposed solution

Let Orca launch and manage external applications (Zed, OpenCode Desktop, or other AI/dev tools) alongside a worktree — either as an embedded pane/tab similar to the built-in terminal and editor, or at minimum as a configurable "open in..." action that launches the preferred IDE/app pointed at the current worktree with one click. This would let users pick their own editor/tooling per-project without leaving Orca.

### Alternatives or additional context

_No response_