feat(desktop): Change Terminal's Cursor to Bar and Stop Blinking when not focused

[dbpolito]

What does this PR do?

Currently terminal cursor keeps blinking even when not focused, this PR makes it not blink when unfocused.

I also changed the cursor to be bar instead of cursor, which is Ghostty default, and cleaner.

How did you verify your code works?

Tested with and without focus

[github-actions]

Hey! Your PR title Desktop: Change Cursor to Bar and Stop Blinking when not focused doesn't follow conventional commit format.

Please update it to start with one of:

• feat: or feat(scope): new feature
• fix: or fix(scope): bug fix
• docs: or docs(scope): documentation changes
• chore: or chore(scope): maintenance tasks
• refactor: or refactor(scope): code refactoring
• test: or test(scope): adding or updating tests

Where scope is the package name (e.g., app, desktop, opencode).

See CONTRIBUTING.md for details.

[github-actions]

Thanks for your contribution!

This PR doesn't have a linked issue. All PRs must reference an existing issue.

Please:

1. Open an issue describing the bug/feature (if one doesn't exist)
2. Add Fixes #<number> or Closes #<number> to this PR description

See CONTRIBUTING.md for details.

[github-actions]

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

Found a related PR! Here's what I discovered:

Potential Related PR:

PR #7401: fix(desktop): Remove Cursor Unfocused Prompt Input

Why it's related: This PR (7401) appears to address cursor behavior when unfocused, which is directly related to PR #7402. Both PRs seem to be dealing with cursor rendering and focus state interactions in the desktop terminal. They may be complementary fixes or possibly overlapping changes to the same feature area.