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>

firmware/targets/local/api-hal/api-hal-gpio.c

@@ -0,0 +1,47 @@
+#include "api-hal-gpio.h"
+#include <stdio.h>
+
+// init GPIO
+void hal_gpio_init(GpioPin* gpio, GpioMode mode, GpioPull pull, GpioSpeed speed){
+    // TODO more mode
+    if(gpio->pin != 0) {
+        switch(mode) {
+        case GpioModeInput:
+            printf("[GPIO] %s%d input\n", gpio->port, gpio->pin);
+            break;
+
+        case GpioModeOutputPushPull:
+            printf("[GPIO] %s%d push pull\n", gpio->port, gpio->pin);
+            break;
+
+        case GpioModeOutputOpenDrain:
+            printf("[GPIO] %s%d open drain\n", gpio->port, gpio->pin);
+            break;
+        
+        default:
+            printf("[GPIO] %s%d mode %d unsupported\n", gpio->port, gpio->pin, mode);
+            break;
+        }
+    } else {
+        printf("[GPIO] no pin\n");
+    }
+}
+
+// write value to GPIO, false = LOW, true = HIGH
+void hal_gpio_write(GpioPin* gpio, bool state){
+    if(gpio->pin != 0) {
+        if(state) {
+            printf("[GPIO] %s%d on\n", gpio->port, gpio->pin);
+        } else {
+            printf("[GPIO] %s%d off\n", gpio->port, gpio->pin);
+        }
+    } else {
+        printf("[GPIO] no pin\n");
+    }
+}
+
+// read value from GPIO, false = LOW, true = HIGH
+bool hal_gpio_read(GpioPin* gpio){
+    // TODO emulate pin state?
+    return false;
+}