[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

core/furi-hal/api-interrupt-mgr.h

@@ -1,3 +1,8 @@
+/**
+ * @file api-interrupt-mgr.h
+ * Furi: interrupt API
+ */
+
 #pragma once
 
 #include <stdbool.h>
@@ -23,45 +28,45 @@ typedef struct {
     bool ready;
 } InterruptCallbackItem;
 
-/**
- * Init interrupt
- * @return true on succsessful initialization, false otherwise
+/** Init interrupt
+ *
+ * @return     true on succsessful initialization, false otherwise
  */
 bool api_interrupt_init();
 
-/**
- * Add interrupt
- * @param callback InterruptCallback
- * @param type InterruptType
- * @param context context for callback
+/** Add interrupt
+ *
+ * @param      callback  InterruptCallback
+ * @param      type      InterruptType
+ * @param      context   context for callback
  */
 void api_interrupt_add(InterruptCallback callback, InterruptType type, void* context);
 
-/**
- * Remove interrupt
- * @param callback InterruptCallback
- * @param type InterruptType
+/** Remove interrupt
+ *
+ * @param      callback  InterruptCallback
+ * @param      type      InterruptType
  */
 void api_interrupt_remove(InterruptCallback callback, InterruptType type);
 
-/**
- * Enable interrupt
- * @param callback InterruptCallback
- * @param type InterruptType
+/** Enable interrupt
+ *
+ * @param      callback  InterruptCallback
+ * @param      type      InterruptType
  */
 void api_interrupt_enable(InterruptCallback callback, InterruptType type);
 
-/**
- * Disable interrupt
- * @param callback InterruptCallback
- * @param type InterruptType
+/** Disable interrupt
+ *
+ * @param      callback  InterruptCallback
+ * @param      type      InterruptType
  */
 void api_interrupt_disable(InterruptCallback callback, InterruptType type);
 
-/**
- * Call interrupt
- * @param type InterruptType
- * @param hw pointer to hardware peripheral
+/** Call interrupt
+ *
+ * @param      type  InterruptType
+ * @param      hw    pointer to hardware peripheral
  */
 void api_interrupt_call(InterruptType type, void* hw);