Move to src dir usage (#99)

src/crewai/process.py

@@ -0,0 +1,11 @@
+from enum import Enum
+
+
+class Process(str, Enum):
+    """
+    Class representing the different processes that can be used to tackle tasks
+    """
+
+    sequential = "sequential"
+    # TODO: consensual = 'consensual'
+    # TODO: hierarchical = 'hierarchical'