…t Calendar logic
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## Description
<!--- Describe your changes in detail -->
Implement Calendar logic
## Type of Change
<!--- Put an `x` in all the boxes that apply: -->
- [x] ✨ New feature (non-breaking change which adds functionality)
- [ ] 🛠️ Bug fix (non-breaking change which fixes an issue)
- [ ] ❌ Breaking change (fix or feature that would cause existing
functionality to change)
- [ ] 🧹 Code refactor
- [ ] ✅ Build configuration change
- [ ] 📝 Documentation
- [ ] 🗑️ Chore
- Introduced UUID for ProductAllocation to ensure unique identification.
- Refactored AssignTagsDialog to manage tag assignments and validation more effectively, including error handling for empty tags and duplicate tag usage.
- Updated AssignTagsTable to support dynamic product allocation management and improved UI interactions.
- Enhanced AddDeviceTypeWidget to maintain selected products and handle increment/decrement actions, improving user experience during device type selection.
- Added AssignTagsErrorMessages widget for better error visibility in tag assignment process.
- Updated RemoteTagsService to remove LoadTagsParam and fetch project UUID internally, enhancing encapsulation and reducing parameter dependency.
- Modified TagsService interface to reflect the new loading method signature.
- Adjusted TagsBloc to align with the updated service method, simplifying the loading process.
- Enhanced AssignTagsTable and AddDeviceTypeWidget to utilize the new data flow, improving maintainability and user experience.
- Replaced Text with SelectableText in AddDeviceTypeWidget and AssignTagsTable for better text selection and accessibility.
- Simplified onCancel action in AssignTagsDialog for improved readability.
- Enhanced ProductsGrid layout by removing unnecessary Column widget, streamlining the widget structure for better performance and maintainability.
- Extracted loading and error handling logic into separate methods for better readability and maintainability.
- Updated UI to utilize centralized loading and failure widgets, enhancing user experience during data fetching.
- Replaced ProductTypeCard with ProductsGrid in AddDeviceTypeWidget for improved layout and maintainability.
- Converted ProductTypeCardCounter from StatefulWidget to StatelessWidget, simplifying its implementation.
- Updated ProductTypeCard to accept count and increment/decrement callbacks, enhancing its reusability and interaction.
- Introduced ProductsGrid to manage product display in a grid format, improving UI organization and responsiveness.
