[FL-1884] GPIO application (#732)

* gpio: rename gpio application
* bq25896: add reading OTG config
* furi-hal-power: add is_otg_enabled API
* gpio: introduce new GPIO app, add OTG enable / disable
* variable-item-list: add enter callback
* gpio: add output test view and scene
* gpio app: fix GpioItemTester -> GpioItemTest

Co-authored-by: あく <alleteam@gmail.com>

firmware/targets/f6/furi-hal/furi-hal-power.c

@@ -180,6 +180,10 @@ void furi_hal_power_disable_otg() {
     bq25896_disable_otg();
 }
 
+bool furi_hal_power_is_otg_enabled() {
+    return bq25896_is_otg_enabled();
+}
+
 uint32_t furi_hal_power_get_battery_remaining_capacity() {
     return bq27220_get_remaining_capacity();
 }

firmware/targets/f7/furi-hal/furi-hal-power.c

@@ -180,6 +180,10 @@ void furi_hal_power_disable_otg() {
     bq25896_disable_otg();
 }
 
+bool furi_hal_power_is_otg_enabled() {
+    return bq25896_is_otg_enabled();
+}
+
 uint32_t furi_hal_power_get_battery_remaining_capacity() {
     return bq27220_get_remaining_capacity();
 }

firmware/targets/furi-hal-include/furi-hal-power.h

@@ -69,6 +69,9 @@ void furi_hal_power_enable_otg();
 /** OTG disable */
 void furi_hal_power_disable_otg();
 
+/** Get OTG status */
+bool furi_hal_power_is_otg_enabled();
+
 /** Get remaining battery battery capacity in mAh */
 uint32_t furi_hal_power_get_battery_remaining_capacity();