Improve progress tracking and UI

[mapitman]

Summary

• stabilize progress time formatting and freezing
• refine rip/encode/overall progress tracking and completion messaging
• add tests for progress display and rip summary tracking
• apply formatting updates and ignore .cst dumps

Testing

• dotnet test

[Copilot]

Pull request overview

This PR improves progress tracking and UI in the RipSharp disc ripping application. It stabilizes time formatting to always use a consistent HH:MM:SS format, adds timer freezing when tasks complete, refactors overall progress tracking with a dedicated tracker class, and adds a completion message summarizing rip results.

Changes:

• Standardized time display format to HH:MM:SS and added timer freezing on task completion
• Refactored overall progress tracking with new OverallProgressTracker class for cleaner code
• Added comprehensive tests for progress display, rip summary, and overall progress tracking

Reviewed changes

Copilot reviewed 11 out of 12 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
src/RipSharp/Utilities/SpectreProgressDisplay.cs	Standardized time format to HH:MM:SS, added _stopTime field for timer freezing, and improved value reset logic
src/RipSharp/Services/DiscRipper.cs	Introduced OverallProgressTracker class, added rip completion message, and refactored progress tracking calls
src/RipSharp/MakeMkv/MakeMkvOutputHandler.cs	Enhanced progress parsing to handle fraction, percentage, and byte-based progress values
src/RipSharp/Core/Program.cs	Minor formatting cleanup
src/RipSharp.Tests/Utilities/SpectreProgressDisplayTests.cs	New tests for time formatting, timer reset, and timer freezing
src/RipSharp.Tests/Services/DiscRipperRipSummaryTests.cs	New test for rip completion message formatting
src/RipSharp.Tests/Services/DiscRipperOverallProgressTests.cs	New tests for overall progress tracker behavior
src/RipSharp.Tests/Core/RipOptionsTests.cs	Fixed closing braces formatting
Makefile	Removed 'restore' dependency from format target
.gitignore	Added *.cst files (disc structure dumps) to ignore list
.editorconfig	Moved insert_final_newline to global section for consistency
.github/copilot-instructions.md	New file with coding guidelines and instructions

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