Enhance workflow manager and definitions with category support for better organization

custom/workflows/README.md

@@ -13,6 +13,7 @@ This directory contains workflow definitions in JSON format that can be imported
     "trigger_type": "afterRecordSaved",
     "is_active": true,
     "description": "Description of what this workflow does",
+    "category": "Category Name",
     "conditions_all": [],
     "conditions_any": [],
     "conditions_formula": null,
@@ -24,6 +25,7 @@ This directory contains workflow definitions in JSON format that can be imported
 - `afterRecordSaved` - After record is created or updated
 - `afterRecordCreated` - Only after record is created
 - `scheduled` - Runs on a schedule
+- `manual` - Manually triggered
 
 **Condition Types:**
 - `equals`, `notEquals`, `greaterThan`, `lessThan`, `contains`, `notContains`, `isEmpty`, `isNotEmpty`, `isTrue`, `isFalse`, `wasEqual`, `wasNotEqual`, `changed`, `notChanged`