refactor: Modularize conversational flows into individual files

This commit refactors the conversational flow architecture by splitting the monolithic `flows.json` file into individual JSON files for each flow, located in the new `talia_bot/data/flows/` directory.

Key changes:
- **Modular Flow Files:** Each conversational flow is now an independent JSON file (e.g., `admin_check_agenda.json`), improving maintainability and making it easier to modify or add new flows.
- **Updated Flow Engine:** The `FlowEngine` in `talia_bot/modules/flow_engine.py` has been updated to dynamically load all `.json` files from the `talia_bot/data/flows/` directory at startup.
- **Removed Monolithic File:** The old `talia_bot/data/flows.json` file has been deleted, completing the transition to the new modular structure.

This change enhances the organization of the project and aligns with the user's request for easier modification of individual flows.

talia_bot/modules/flow_engine.py

@@ -1,6 +1,7 @@
 # talia_bot/modules/flow_engine.py
 import json
 import logging
+import os
 from talia_bot.db import get_db_connection
 
 logger = logging.getLogger(__name__)
@@ -10,23 +11,38 @@ class FlowEngine:
         self.flows = self._load_flows()
 
     def _load_flows(self):
-        """Loads and flattens flow definitions from the JSON file."""
+        """Loads all individual flow JSON files from the flows directory."""
+        flows_dir = 'talia_bot/data/flows'
+        loaded_flows = []
         try:
-            with open('talia_bot/data/flows.json', 'r', encoding='utf-8') as f:
+            if not os.path.exists(flows_dir):
-                all_flows_by_role = json.load(f)
+                logger.error(f"Flows directory not found at '{flows_dir}'")
-
-            flattened_flows = []
-            for role, data in all_flows_by_role.items():
-                if 'flows' in data:
-                    for flow in data['flows']:
-                        flow['role'] = role
-                        flattened_flows.append(flow)
-            return flattened_flows
-        except FileNotFoundError:
-            logger.error("flows.json not found.")
                 return []
+
+            for filename in os.listdir(flows_dir):
+                if filename.endswith('.json'):
+                    file_path = os.path.join(flows_dir, filename)
+                    try:
+                        with open(file_path, 'r', encoding='utf-8') as f:
+                            flow_data = json.load(f)
+                            # Asignar un rol basado en el prefijo del nombre del archivo, si existe
+                            if filename.startswith('admin_'):
+                                flow_data['role'] = 'admin'
+                            elif filename.startswith('crew_'):
+                                flow_data['role'] = 'crew'
+                            elif filename.startswith('client_'):
+                                flow_data['role'] = 'client'
+                            loaded_flows.append(flow_data)
                     except json.JSONDecodeError:
-            logger.error("Error decoding flows.json.")
+                        logger.error(f"Error decoding JSON from {filename}.")
+                    except Exception as e:
+                        logger.error(f"Error loading flow from {filename}: {e}")
+
+            logger.info(f"Successfully loaded {len(loaded_flows)} flows.")
+            return loaded_flows
+
+        except Exception as e:
+            logger.error(f"Failed to load flows from directory {flows_dir}: {e}")
             return []
 
     def get_flow(self, flow_id):