feat(main): spinner for each command

[dfayd0]

No description provided.

[Copilot]

Pull Request Overview

Enhances user feedback by showing a loading spinner around each LeetCode CLI command.

• Imports and configures the spinners crate.
• Wraps each api_runner call in a spinner to indicate progress.
• Adds spinners = "4.1.1" to Cargo.toml.

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.

File	Description
src/main.rs	Wrapped get_problem_info, start_problem, test_response, and submit_response calls with a start/stop spinner.
Cargo.toml	Added the spinners dependency for console loading animations.

Comments suppressed due to low confidence (2)

src/main.rs:46

• [nitpick] The variable start_problem holds a response, not a problem. Consider renaming it to start_response or start_result for consistency with test_result and submit_result.

            let start_problem = api_runner.start_problem(*id, lang).await?;

src/main.rs:54

• [nitpick] The indentation here deviates from the multi-line style used elsewhere. Align the Spinner::new call parameters across multiple lines to match the style in other branches.

            let mut spinner =