Add Docker support and enhance data models for tender details

- Introduced a .dockerignore file to optimize Docker builds by excluding unnecessary files.
- Updated the Dockerfile to use a Flutter base image, enabling web builds for the application.
- Added new data models for `Lot` and `OrganizationAddress` to represent tender details more accurately.
- Enhanced the `Organization` model to include `companyId` and a nested `address` field.
- Updated the `TenderData` model to include new fields such as `noticeTypeCode`, `formType`, and `lots`, reflecting the API response structure.
- Regenerated necessary code for data models to ensure compatibility with the updated structures.

.dockerignore

@@ -0,0 +1,16 @@
+build
+.dart_tool
+.git
+.gitignore
+.drone.yml
+.vscode
+.idea
+.flutter-plugins-dependencies
+README.md
+*.md
+Dockerfile
+Dockerfile-old
+.dockerignore
+artifacts
+ios
+android