feat: support chatflow start node custom input field hidden (#19678)

api/core/app/app_config/entities.py

@@ -109,6 +109,7 @@ class VariableEntity(BaseModel):
     description: str = ""
     type: VariableEntityType
     required: bool = False
+    hide: bool = False
     max_length: Optional[int] = None
     options: Sequence[str] = Field(default_factory=list)
     allowed_file_types: Sequence[FileType] = Field(default_factory=list)