External module api (#2290)

* added external module debug view

* integrated module driver into i2c subsystem

* implemented i2c app loader

* added view mirror api

* fixed build

* added i2c to module api

* implemented standalone app touch event

* implemented focus management

* reverted formating change

* refactoring

* refactoring

* implemented events

* fixed memory usage

firmware/common/ui_text.hpp

@@ -94,6 +94,10 @@ class Font {
 
     Size size_of(const std::string s) const;
 
+    const uint8_t* get_data() const {
+        return data;
+    }
+
    private:
     const Dim w;
     const Dim h;