Add projects UI as intermediate layer between streams and episodes

[Copilot]

This PR implements a new projects feature that allows users to collect video cuts from multiple streams into projects before creating episodes, addressing the need for better organization and workflow flexibility in the video editing process.

What was added

Projects CRUD Management:

• Complete React Admin resource implementation with List, Create, Edit views
• Full API endpoints with mock data for development
• Navigation integration in the main menu
• Search and filtering capabilities

Enhanced VideoEditor Workflow:

• New ExportOptionsDialog component that allows users to choose between:
  • Creating episodes directly (preserving existing workflow)
  • Sending cuts to an existing project (new aggregation workflow)
• useSendCutsToProject hook for seamless project integration
• Real-time project loading and selection

Architecture Improvements:

• Added projects resource to data provider and resource map
• Enhanced VideoEditor with dual workflow support
• Proper data structure for collecting cuts from multiple streams
• User feedback and error handling throughout

Key Benefits

• Multi-stream aggregation: Users can now collect cuts from different streams into a single project
• Workflow flexibility: Choose immediate episode creation or project-based organization
• Better editorial control: Organize and review cuts before final episode production
• Backward compatibility: Existing direct episode creation workflow is preserved

Data Flow

• Before: Streams → Video Clips → Episodes (direct)
• After: Streams → Video Clips → Projects → Episodes (with aggregation option)

The implementation follows existing React Admin patterns and maintains consistency with the current codebase architecture. All TypeScript compilation passes, tests are green (68/68), and the production build is successful.

Fixes #101.

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[Copilot]

Pull Request Overview

This PR implements a new projects feature that creates an intermediate organizational layer between streams and episodes, enabling users to collect video cuts from multiple streams before creating final episodes. The implementation adds complete CRUD functionality for projects, enhances the VideoEditor workflow with export options, and maintains backward compatibility with the existing direct episode creation flow.

• Adds full projects resource with React Admin CRUD views and API mock endpoints
• Introduces ExportOptionsDialog component providing dual workflow options (direct episodes vs project aggregation)
• Implements useSendCutsToProject hook for seamless project integration with proper data transformation

Reviewed Changes

Copilot reviewed 11 out of 11 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
src/resources/streams/VideoEditor.tsx	Enhanced with ExportOptionsDialog integration and dual export workflow
src/resources/projects/index.tsx	New projects resource configuration for React Admin
src/resources/projects/List.tsx	Projects list view with filtering and search capabilities
src/resources/projects/Edit.tsx	Simple form for editing project title and description
src/resources/projects/Create.tsx	Creation form for new projects
src/ra/dataProvider/resourceMap.ts	Added projects mapping to API endpoints
src/mocks/handlers/internal.ts.backup	Large mock data file (appears to be backup/generated)
src/mocks/handlers/internal.ts	Added projects API mock handlers for development
src/hooks/useSendCutsToProject.ts	Custom hook for sending video cuts to projects with proper data transformation
src/components/molecules/ExportOptionsDialog.tsx	Modal dialog for choosing export destination (episodes vs projects)
src/App.tsx	Registered projects resource in the main application