Update doxygen and fix documentation (#5106)

Update Doxyfile to version 1.9.1

Re-enable doxygen CI checker

Fix some regular comments that should have been doc comments

Document void return types for some inline functions explicitly

Move start of some doxygen groups so they are included always, and not left
out of certain ifdefs

Ignore some doxygen warnings:
    Member (function) is not documented in headers
    Documented empty return type in headers
    Argument has multiple @param documentation sections

JerryScript-DCO-1.0-Signed-off-by: Máté Tokodi mate.tokodi@szteszoftver.hu

jerry-core/ecma/operations/ecma-objects.c

@@ -3267,6 +3267,8 @@ ecma_op_ordinary_object_is_extensible (ecma_object_t *object_p) /**< object */
 
 /**
  * Set value of [[Extensible]] object's internal property.
+ *
+ * @return void
  */
 void JERRY_ATTR_NOINLINE
 ecma_op_ordinary_object_prevent_extensions (ecma_object_t *object_p) /**< object */

jerry-core/ecma/operations/ecma-promise-object.c

@@ -68,6 +68,8 @@ ecma_promise_get_result (ecma_object_t *obj_p) /**< points to promise object */
 
 /**
  * Set the PromiseResult of promise.
+ *
+ * @return void
  */
 static inline void JERRY_ATTR_ALWAYS_INLINE
 ecma_promise_set_result (ecma_object_t *obj_p, /**< points to promise object */
@@ -97,6 +99,8 @@ ecma_promise_get_flags (ecma_object_t *obj_p) /**< points to promise object */
 
 /**
  * Set the PromiseState of promise.
+ *
+ * @return void
  */
 static inline void JERRY_ATTR_ALWAYS_INLINE
 ecma_promise_set_state (ecma_object_t *obj_p, /**< points to promise object */

jerry-core/ecma/operations/ecma-shared-arraybuffer-object.h

@@ -18,8 +18,6 @@
 
 #include "ecma-globals.h"
 
-#if JERRY_BUILTIN_SHAREDARRAYBUFFER
-
 /** \addtogroup ecma ECMA
  * @{
  *
@@ -27,6 +25,8 @@
  * @{
  */
 
+#if JERRY_BUILTIN_SHAREDARRAYBUFFER
+
 ecma_value_t ecma_op_create_shared_arraybuffer_object (const ecma_value_t *, uint32_t);
 
 /**

jerry-core/ecma/operations/ecma-string-object.c

@@ -98,8 +98,6 @@ ecma_op_create_string_object (const ecma_value_t *arguments_list_p, /**< list of
 
 /**
  * List names of a String object's lazy instantiated properties
- *
- * @return string values collection
  */
 void
 ecma_op_string_list_lazy_property_names (ecma_object_t *obj_p, /**< a String object */