feat(authorize): add implicit authorize flow

config.example.toml

@@ -0,0 +1,28 @@
+[instance]
+base_uri = "http://localhost:8085"
+name = "Example org"
+logo_uri = "https://example.org/logo.png"
+
+[[applications]]
+slug = "demo_app"
+name = "Demo app"
+description = "A super application where you can do everything you want."
+client_id = "a1785786-8be1-443c-9a6f-35feed703609"
+client_secret = "49c6c16a-0a8a-4981-a60d-5cb96582cc1a"
+allowed_redirect_uris = [
+    "http://localhost:9090/authorize",
+    "http://localhost:9876/callback"
+]
+authorize_flow = "implicit"
+
+[[roles]]
+slug = "basic"
+name = "Basic"
+description = "Basic user"
+default = true
+
+[[roles]]
+slug = "admin"
+name = "Administrator"
+description = "Full power on organization instance"
+