move final legacy config to plugins and fix archivebox config cmd and add search opt

archivebox/plugins_extractor/pocket/config.py

@@ -0,0 +1,15 @@
+__package__ = 'plugins_extractor.pocket'
+
+from typing import Dict
+
+from pydantic import Field
+
+from abx.archivebox.base_configset import BaseConfigSet
+
+
+class PocketConfig(BaseConfigSet):
+    POCKET_CONSUMER_KEY: str | None                   = Field(default=None)
+    POCKET_ACCESS_TOKENS: Dict[str, str]              = Field(default=lambda: {})   # {<username>: <access_token>, ...}
+
+
+POCKET_CONFIG = PocketConfig()