Power: bq25896 and bq27220 drivers, portable power api. (#224)

* Power: add portability layer, port to F3.
* F3: bq25896 driver stab
* GUI: new primary and secondary fonts
* F3: bq25896 register map, basic functions
* F3: move bq27220 command descritpion to separate file. Code format.
* Power: OTG enable/disable
* Power: choose more correct profile
* F3: pet bq25896 watchdog sometimes

firmware/targets/f3/Inc/bq25896.h

@@ -0,0 +1,18 @@
+#pragma once
+
+#include <stdbool.h>
+
+/* Initialize Driver */
+void bq25896_init();
+
+/* Send device into shipping mode */
+void bq25896_poweroff();
+
+/* Is currently charging */
+bool bq25896_is_charging();
+
+/* Enable otg */
+void bq25896_enable_otg();
+
+/* Disable otg */
+void bq25896_disable_otg();