Api hw gpio pwm (#199)

* initial gpio layer

* move temlplate.c to template.c.example in preparing to applications.mk rework

* separate arduino layer

* separate flipper_hal.x

* prepare to switch applications on v2 core gpio api

* swithch applications to v2 gpio api

* gpio api for local target

* better gpio_disable handling

* remove pwm functions from local target

* inline gpio funcs

* common function to init all api's

* fix local example blink

* move delay us to hal api folder

* move pwm_set/pwm_stop to hal api folder

* update applications to use hal pwm api

* remove gpio mode case warning

* add speaker demo to build

Co-authored-by: DrZlo13 <who.just.the.doctor@gmail.com>

core/flipper_v2.h

@@ -14,8 +14,15 @@ extern "C" {
 
 #include "api-basic/memmgr.h"
 
+#include "api-hal/api-gpio.h"
+
 #include "gui/gui.h"
 
+// tmeout for helper functions
+#define FLIPPER_HELPER_TIMEOUT 10
+
+bool init_flipper_api(void);
+
 #ifdef __cplusplus
 }
 #endif