[FL-1906] Documentation: add Doxyfile, prepare sources for doxygen. (#741)

* Documentation: add Doxyfile, prepare sources for doxygen.

* Update ReadMe and remove obsolete CLA

* Add contribution guide

* Contributing: update text

* Correct spelling

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

@@ -1,4 +1,10 @@
+/**
+ * @file furi-hal-rfid.h
+ * RFID HAL API
+ */
+
 #pragma once
+
 #include <stdint.h>
 #include <stdbool.h>
 #include <main.h>
@@ -7,111 +13,91 @@
 extern "C" {
 #endif
 
-/** Initialize RFID subsystem */
+/** Initialize RFID subsystem
+ */
 void furi_hal_rfid_init();
 
-/**
- * @brief config rfid pins to reset state
- * 
+/** Config rfid pins to reset state
  */
 void furi_hal_rfid_pins_reset();
 
-/**
- * @brief config rfid pins to emulate state
- * 
+/** Config rfid pins to emulate state
  */
 void furi_hal_rfid_pins_emulate();
 
-/**
- * @brief config rfid pins to read state
- * 
+/** Config rfid pins to read state
  */
 void furi_hal_rfid_pins_read();
 
-/**
- * @brief config rfid timer to read state
- * 
- * @param freq timer frequency
- * @param duty_cycle timer duty cycle, 0.0-1.0
+/** Config rfid timer to read state
+ *
+ * @param      freq        timer frequency
+ * @param      duty_cycle  timer duty cycle, 0.0-1.0
  */
 void furi_hal_rfid_tim_read(float freq, float duty_cycle);
 
-/**
- * @brief start read timer
- * 
+/** Start read timer
  */
 void furi_hal_rfid_tim_read_start();
 
-/**
- * @brief stop read timer
- * 
+/** Stop read timer
  */
 void furi_hal_rfid_tim_read_stop();
 
-/**
- * @brief config rfid timer to emulate state
- * 
- * @param freq timer frequency
+/** Config rfid timer to emulate state
+ *
+ * @param      freq  timer frequency
  */
 void furi_hal_rfid_tim_emulate(float freq);
 
-/**
- * @brief start emulation timer
- * 
+/** Start emulation timer
  */
 void furi_hal_rfid_tim_emulate_start();
 
-/**
- * @brief stop emulation timer
- * 
+/** Stop emulation timer
  */
 void furi_hal_rfid_tim_emulate_stop();
 
-/**
- * @brief config rfid timers to reset state
- * 
+/** Config rfid timers to reset state
  */
 void furi_hal_rfid_tim_reset();
 
-/**
- * @brief check that timer instance is emulation timer
- * 
- * @param hw timer instance
+/** Check that timer instance is emulation timer
+ *
+ * @param      hw    timer instance
+ *
+ * @return     true if instance is emulation timer
  */
 bool furi_hal_rfid_is_tim_emulate(TIM_HandleTypeDef* hw);
 
-/**
- * @brief set emulation timer period
- * 
- * @param period overall duration
+/** Set emulation timer period
+ *
+ * @param      period  overall duration
  */
 void furi_hal_rfid_set_emulate_period(uint32_t period);
 
-/**
- * @brief set emulation timer pulse
- * 
- * @param pulse duration of high level
+/** Set emulation timer pulse
+ *
+ * @param      pulse  duration of high level
  */
 void furi_hal_rfid_set_emulate_pulse(uint32_t pulse);
 
-/**
- * @brief set read timer period
- * 
- * @param period overall duration
+/** Set read timer period
+ *
+ * @param      period  overall duration
  */
 void furi_hal_rfid_set_read_period(uint32_t period);
 
-/**
- * @brief set read timer pulse
- * 
- * @param pulse duration of high level
+/** Set read timer pulse
+ *
+ * @param      pulse  duration of high level
  */
 void furi_hal_rfid_set_read_pulse(uint32_t pulse);
 
-/**
- * Сhanges the configuration of the RFID timer "on a fly"
- * @param freq new frequency
- * @param duty_cycle new duty cycle
+/** Сhanges the configuration of the RFID timer "on a fly"
+ *
+ * @param      freq        new frequency
+ * @param      duty_cycle  new duty cycle
  */
 void furi_hal_rfid_change_read_config(float freq, float duty_cycle);