Add base farm automation code (main branch)

farm_core/agent.py

@@ -0,0 +1,8 @@
+class FarmAgent:
+    def __init__(self, name, module):
+        self.name = name
+        self._module = module
+
+    @staticmethod
+    def get_manual():
+        return "Инструкция: pH 6.0"