[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.h

@@ -111,6 +111,13 @@ void furi_hal_resources_deinit_early();
 
 void furi_hal_resources_init();
 
+/**
+ * Get a corresponding external connector pin number for a gpio
+ * @param gpio GpioPin
+ * @return pin number or -1 if gpio is not on the external connector
+ */
+int32_t furi_hal_resources_get_ext_pin_number(const GpioPin* gpio);
+
 #ifdef __cplusplus
 }
 #endif