Add note to orderSequentially that it may enter staging mode

[kian-thompson]

The orderSequentially function may enter staging mode for the duration of the call. Because of this, an error will be thrown if a user tries to enter staging mode in the callback provided to orderSequentially. The error's message is "Already in staging mode", and could be confusing from the end user's perspective as they never entered staging mode themselves.

See #24728 (comment)

Example:

// This will throw a UsageError "Already in staging mode"
containerRuntime.orderSequentially(() => {
    containerRuntime.enterStagingMode();
});

[Copilot]

Pull Request Overview

This PR enhances the documentation for the orderSequentially function to clarify that it may enter staging mode for the duration of its execution, which helps explain potential error messages for users.

• Added a @remarks section in the documentation
• Clarified that staging mode is required for rolling back certain op types