Add author and project sorting options

[KSemenenko]

Summary

Add sorting options that prioritize author or project-oriented organization, because sorting only by duration or WPM is less useful for some browsing workflows. Treat this as additive; do not remove existing sort modes unless explicitly confirmed later.

Source

• Category: UI & Organization
• Feedback video: https://youtu.be/IeUoMyx7dKE?t=9m42s

Acceptance criteria

• Script browsing offers author and/or project-oriented sorting options.
• Existing duration and WPM sort modes remain available.
• Sorting labels and persisted defaults stay consistent across reloads and narrow layouts.
• Add or update browser/UI test coverage for the relevant user flow.
• Solution tests pass before the issue is marked ready for user verification.

Implementation note

Treat this as an additive feature or presentation option. Do not remove existing behavior unless the user explicitly confirms deletion.

[KSemenenko]

Implemented and pushed in commit 7e892f0 on main.

What changed:

• Added Author and Project sort modes to the existing Library sort bar without removing Name, Date, Duration, or WPM.
• Project sort orders scripts by their folder/project organization label, then title.
• Sort selection continues to persist through Library view state and reloads.
• Added localized labels for the new sort modes.
• Added bUnit and Shell browser coverage for project sort ordering and reload persistence.

Verification:

• dotnet build ./PrompterOne.slnx -warnaserror --no-restore
• dotnet test @./tests/dotnet-test-progress.rsp --project ./tests/PrompterOne.Web.Tests/PrompterOne.Web.Tests.csproj -- --treenode-filter "///LibraryFolderInteractionTests/LibraryPage_ProjectSortOrdersCardsByFolderName_AndPersistsSelection"
• dotnet test @./tests/dotnet-test-progress.rsp --project ./tests/PrompterOne.Web.UITests.Shell/PrompterOne.Web.UITests.Shell.csproj -- --treenode-filter "///LibraryScreenFlowTests/LibraryScreen_ProjectSortPersistsAcrossReloads"
• dotnet test @./tests/dotnet-test-progress.rsp --solution ./PrompterOne.slnx

Full solution result: 1134 passed, 0 failed. @byskyphy please review when you have a chance.

[byskyphy]

what is now "sort by" and "organize as" should be combined, if not removed entirely.

the feedback in the video was : people don't sort script by how many words per minute they're saying, so sort it by human-relevant metadata.

This is not a priority at this stage