[FL-3057] Allow use of any suitable pin for 1-Wire devices (#2350)

* Add 1-wire thermometer example app stub
* Working 1-wire thermometer app
* Refactor app to use threads
* Clean up code, add comments
* Add CRC checking
* Increase update period
* Fix error in fbt
* Revert the old update period
* Use settable pin in onewire_host
* Use settable pin for onewire_slave
* Clear EXTI flag after callback, make private methods static in onewire_slave
* Do not hardcode GPIO pin number
* Remove iButton hal from furi_hal_rfid
* Remove most of furi_hal_ibutton
* Add some of furi_hal_ibutton back
* Slightly neater code
* Fix formatting
* Fix PVS-studio warnings
* Update CODEOWNERS
* Add furi_hal_gpio_get_ext_pin_number
* Create README.md
* FuriHal: move furi_hal_gpio_get_ext_pin_number to resources

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

firmware/targets/f18/furi_hal/furi_hal_resources.c

@@ -199,3 +199,27 @@ void furi_hal_resources_init() {
     NVIC_SetPriority(EXTI15_10_IRQn, NVIC_EncodePriority(NVIC_GetPriorityGrouping(), 5, 0));
     NVIC_EnableIRQ(EXTI15_10_IRQn);
 }
+
+int32_t furi_hal_resources_get_ext_pin_number(const GpioPin* gpio) {
+    // TODO: describe second ROW
+    if(gpio == &gpio_ext_pa7)
+        return 2;
+    else if(gpio == &gpio_ext_pa6)
+        return 3;
+    else if(gpio == &gpio_ext_pa4)
+        return 4;
+    else if(gpio == &gpio_ext_pb3)
+        return 5;
+    else if(gpio == &gpio_ext_pb2)
+        return 6;
+    else if(gpio == &gpio_ext_pc3)
+        return 7;
+    else if(gpio == &gpio_ext_pc1)
+        return 15;
+    else if(gpio == &gpio_ext_pc0)
+        return 16;
+    else if(gpio == &ibutton_gpio)
+        return 17;
+    else
+        return -1;
+}