refactor: sort json before exporting and add tags to flows (#6849)

* feat: Enhance flow download with recursive JSON sorting

- Add `sortJsonStructure` function to recursively sort object keys and array elements
- Improve `downloadFlow` function to create deterministic JSON output
- Add error handling for flow download process
- Ensure consistent and predictable JSON file generation

* feat: Include flow tags in export modal payload

Add `tags` to the export modal payload to ensure comprehensive flow metadata is preserved during export

* 📝 (model.py): Add tags field to FlowRead and FlowHeader models for better organization and categorization of flows
✨ (use-post-add-flow.ts): Add support for adding tags to a new flow in the frontend
✨ (exportModal/index.tsx): Include tags when exporting a flow in the export modal
♻️ (index.tsx): Refactor ListComponent to remove unnecessary comments and improve code readability
🔧 (reactflowUtils.ts): Update createNewFlow function to include tags field when creating a new flow

* style: add blank line

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Co-authored-by: cristhianzl <cristhian.lousa@gmail.com>
Co-authored-by: italojohnny <italojohnnydosanjos@gmail.com>

src/backend/base/langflow/services/database/models/flow/model.py

@@ -200,6 +200,7 @@ class FlowRead(FlowBase):
     id: UUID
     user_id: UUID | None = Field()
     folder_id: UUID | None = Field()
+    tags: list[str] | None = Field(None, description="The tags of the flow")
 
 
 class FlowHeader(BaseModel):
@@ -215,6 +216,7 @@ class FlowHeader(BaseModel):
     endpoint_name: str | None = Field(None, description="The name of the endpoint associated with this flow")
     description: str | None = Field(None, description="A description of the flow")
     data: dict | None = Field(None, description="The data of the component, if is_component is True")
+    tags: list[str] | None = Field(None, description="The tags of the flow")
 
     @field_validator("data", mode="before")
     @classmethod