figments: command: rewrite command api to use Task instances instead of static functions

src/animations/Power.h

@@ -53,9 +53,6 @@ public:
     }
 
     void forceBrightness(uint8_t v);
-
-    const std::vector<Command>& commands() const override;
-
 private:
     AnimatedNumber m_powerState = 255;
     AnimatedNumber m_brightness = 255;