feat/embeddings plugins (#240)

* feat/embeddings plugins

example usage:
https://github.com/TigreGotico/ovos-face-embeddings-plugin
https://github.com/TigreGotico/ovos-voice-embeddings-plugin
https://github.com/TigreGotico/ovos-chromadb-embeddings-plugin
https://github.com/TigreGotico/ovos-gguf-embeddings-plugin

* distance metrics galore

* distance metrics galore

ovos_plugin_manager/embeddings.py

@@ -0,0 +1,78 @@
+from ovos_plugin_manager.templates.embeddings import EmbeddingsDB, TextEmbeddingsStore, FaceEmbeddingsStore, VoiceEmbeddingsStore
+from ovos_plugin_manager.utils import PluginTypes
+
+
+def find_embeddings_plugins() -> dict:
+    """
+    Find all installed plugins
+    @return: dict plugin names to entrypoints
+    """
+    from ovos_plugin_manager.utils import find_plugins
+    return find_plugins(PluginTypes.EMBEDDINGS)
+
+
+def load_embeddings_plugin(module_name: str) -> type(EmbeddingsDB):
+    """
+    Get an uninstantiated class for the requested module_name
+    @param module_name: Plugin entrypoint name to load
+    @return: Uninstantiated class
+    """
+    from ovos_plugin_manager.utils import load_plugin
+    return load_plugin(module_name, PluginTypes.EMBEDDINGS)
+
+
+def find_voice_embeddings_plugins() -> dict:
+    """
+    Find all installed plugins
+    @return: dict plugin names to entrypoints
+    """
+    from ovos_plugin_manager.utils import find_plugins
+    return find_plugins(PluginTypes.VOICE_EMBEDDINGS)
+
+
+def load_voice_embeddings_plugin(module_name: str) -> type(VoiceEmbeddingsStore):
+    """
+    Get an uninstantiated class for the requested module_name
+    @param module_name: Plugin entrypoint name to load
+    @return: Uninstantiated class
+    """
+    from ovos_plugin_manager.utils import load_plugin
+    return load_plugin(module_name, PluginTypes.VOICE_EMBEDDINGS)
+
+
+def find_face_embeddings_plugins() -> dict:
+    """
+    Find all installed plugins
+    @return: dict plugin names to entrypoints
+    """
+    from ovos_plugin_manager.utils import find_plugins
+    return find_plugins(PluginTypes.FACE_EMBEDDINGS)
+
+
+def load_face_embeddings_plugin(module_name: str) -> type(FaceEmbeddingsStore):
+    """
+    Get an uninstantiated class for the requested module_name
+    @param module_name: Plugin entrypoint name to load
+    @return: Uninstantiated class
+    """
+    from ovos_plugin_manager.utils import load_plugin
+    return load_plugin(module_name, PluginTypes.FACE_EMBEDDINGS)
+
+
+def find_text_embeddings_plugins() -> dict:
+    """
+    Find all installed plugins
+    @return: dict plugin names to entrypoints
+    """
+    from ovos_plugin_manager.utils import find_plugins
+    return find_plugins(PluginTypes.TEXT_EMBEDDINGS)
+
+
+def load_text_embeddings_plugin(module_name: str) -> type(TextEmbeddingsStore):
+    """
+    Get an uninstantiated class for the requested module_name
+    @param module_name: Plugin entrypoint name to load
+    @return: Uninstantiated class
+    """
+    from ovos_plugin_manager.utils import load_plugin
+    return load_plugin(module_name, PluginTypes.TEXT_EMBEDDINGS)