Add abstract plugin class

src/backend/plugins/base_plugin.py

@@ -0,0 +1,30 @@
+from abc import ABC, abstractmethod
+
+
+class Plugin(ABC):
+    def __init__(self) -> None:
+        pass
+
+    @abstractmethod
+    def load(self) -> bool:
+        pass
+
+    @abstractmethod
+    def unload(self) -> bool:
+        pass
+
+    @abstractmethod
+    def health(self) -> bool:
+        pass
+
+    @abstractmethod
+    def image(self) -> str:
+        pass
+
+    @property
+    @abstractmethod
+    def name(self) -> str:
+        pass
+
+    def __str__(self) -> str:
+        return f'<Plugin "{self.name}">'