feat(app): add Run button to titlebar for project startup commands

[mo-dev-studio-eg]

Issue for this PR

Type of change

• Bug fix
• New feature
• Refactor / code improvement
• Documentation

What does this PR do?

Adds a Run button to the titlebar that executes the project startup command. The button appears only when a project has a startup command configured in its settings.

How did you verify your code works?

Reviewed the implementation for correct SDK API usage and consistent styling with existing buttons.

Screenshots / recordings

Not applicable — unable to upload screenshots or recordings at this time.

Checklist

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

[github-actions]

Hey! Your PR title Add project run button 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 updating your PR! It now meets our contributing guidelines. 👍