huge refactor of plugin system

ProviderCore/registry.py

@@ -505,6 +505,18 @@ def _supports_capability(provider: Provider, capability: str) -> bool:
         return _supports_search(provider)
     if capability_key in {"upload", "file", "file-provider"}:
         return _supports_upload(provider)
+    if capability_key in {"pipe-item-context", "pipe-context"}:
+        return _class_supports_method(
+            provider.__class__,
+            "resolve_pipe_item_context",
+            Provider.resolve_pipe_item_context,
+        )
+    if capability_key in {"playlist-store", "playback-store"}:
+        return _class_supports_method(
+            provider.__class__,
+            "infer_playlist_store",
+            Provider.infer_playlist_store,
+        )
     return False
 
 
@@ -514,6 +526,18 @@ def _info_supports_capability(info: PluginInfo, capability: str) -> bool:
         return bool(info.supports_search)
     if capability_key in {"upload", "file", "file-provider"}:
         return bool(info.supports_upload)
+    if capability_key in {"pipe-item-context", "pipe-context"}:
+        return _class_supports_method(
+            info.plugin_class,
+            "resolve_pipe_item_context",
+            Provider.resolve_pipe_item_context,
+        )
+    if capability_key in {"playlist-store", "playback-store"}:
+        return _class_supports_method(
+            info.plugin_class,
+            "infer_playlist_store",
+            Provider.infer_playlist_store,
+        )
     return False