add routes to get all albums and artists with sort

+ rewrite load all albums + artist logic with itertools.groupby
+ add a function to convert seconds to string

app/api/__init__.py

@@ -22,6 +22,7 @@ from app.api import (
     plugins,
     logger,
     home,
+    getall,
 )
 
 
@@ -60,4 +61,7 @@ def create_api():
         # Home
         app.register_blueprint(home.api_bp)
 
+        # Flask Restful
+        app.register_blueprint(getall.api_bp)
+
         return app