feat(tool): add interactive terminal tool with vscode auto-attach

[Albertban]

Issue for this PR

Closes #

Type of change

• New feature

What does this PR do?

Adds a terminal tool to opencode so the agent can open and drive a real interactive PTY (open/read/input/close), and adds VS Code extension support that auto-attaches those sessions into real VS Code terminals via a Pseudoterminal bridge.

Differs from the existing open PR #23794 on the same area by:

• Auto-attaching agent-created PTYs into VS Code terminals (watcher + "Attach Interactive Terminal" command + port discovery), so you can type passwords interactively instead of the non-TTY bash tool.
• Running the command through an explicit shell (powershell / cmd / bash, defaulting to PowerShell on Windows).
• Normalizing input line endings on Windows (\n -> \r) — before this, model-sent \n got stuck in PowerShell's continuation prompt and keystrokes appeared lost.
• Bundling the real extension icons (previous files were placeholder path references).

How did you verify your code works?

• bun typecheck passes in packages/opencode; tsc --noEmit passes in sdks/vscode.
• Verified create/read/input/close roundtrip against a live server, and that auto-attach pops the terminal in VS Code and echoes input both ways.

Screenshots / recordings

N/A (no UI change beyond the auto-attached terminal).

Checklist

• I have tested my changes locally
• I have not included unrelated changes in this PR

[github-actions]

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[github-actions]

The following comment was made by an LLM, it may be inaccurate:

Potential duplicate found:

• PR feat(tool): add interactive terminal tool with persistent PTY sessions #23794: feat(tool): add interactive terminal tool with persistent PTY sessions

This appears to be a closely related PR addressing similar functionality for interactive terminal tooling with PTY sessions. You may want to review whether #23794 is already merged, closed, or if it overlaps with the current PR #41258.

[github-actions]

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