Enhance documentation and workflow management in EspoCRM

- Update README.md to include a table of contents and detailed sections on workflow management and custom scripts.
- Remove deprecated 'runWorkflow' field from CVmhErstgespraech localization files.
- Add 'runWorkflow' field to detail layout for CVmhErstgespraech.
- Update workflow_manager.php to improve workflow listing and management functionality.
- Adjust cache timestamps in config.php.
- Create CUSTOM_DIRECTORY.md to outline the custom directory structure and best practices.
- Add README.md for workflow definitions with usage examples and JSON format specifications.
- Introduce new workflow definitions for 'vmh-erstberatung-abschließen' and its backup.

custom/Espo/Custom/Resources/layouts/CVmhErstgespraech/defaultSidePanel.json

@@ -1,7 +1,4 @@
 [
-    {
-        "name": "runWorkflow"
-    },
     {
         "name": ":assignedUser"
     },

custom/Espo/Custom/Resources/layouts/CVmhErstgespraech/detail.json

@@ -7,6 +7,9 @@
                 },
                 {
                     "name": "nchsterAnruf"
+                },
+                {
+                    "name": "runWorkflow"
                 }
             ]
         ],