Add spinner when reviewing code in non-streaming mode

[loveRyujin]

review命令在非流式输出模式下，进行code review的过程中，新增spinner展示，表示过程正在执行中

[Copilot]

Pull Request Overview

This PR enhances the non-streaming code review experience by adding a spinner to indicate progress during AI operations.

• Introduces a spinner utility in pkg/progress/spinner.go.
• Integrates spinner functionality into code review and translation flows in cmd/review.go.
• Updates dependency versions in go.mod and spinner image references in README.md.

Reviewed Changes

Copilot reviewed 9 out of 9 changed files in this pull request and generated no comments.

File	Description
pkg/progress/spinner.go	Adds spinner wrapper functions to display progress feedback.
go.mod	Updates and adds dependencies required for spinner functionality.
cmd/review.go	Integrates spinner into AI call flows for code review and translation.
README.md	Updates image references to the new spinner-based demo images.

Comments suppressed due to low confidence (2)

cmd/review.go:134

• Consider logging detailed error information from the client.ChatCompletion call inside the spinner wrapper. This additional context may help diagnose underlying issues when the operation fails.

spinnerErr := progress.WithSpinnerAndCustomMessages(

cmd/review.go:207

• Consider logging detailed error information from the translation client.ChatCompletion call to improve error diagnosis. This extra context can assist in troubleshooting failures during translation.

spinnerErr := progress.WithSpinnerAndCustomMessages(