add plugin dep check

lama_cleaner/plugins/base_plugin.py

@@ -0,0 +1,15 @@
+from loguru import logger
+
+
+class BasePlugin:
+    def __init__(self):
+        err_msg = self.check_dep()
+        if err_msg:
+            logger.error(err_msg)
+            exit(-1)
+
+    def __call__(self, rgb_np_img, files, form):
+        ...
+
+    def check_dep(self):
+        ...