Split string-sending debugger API into output- and log-sending functions (#2461)

This helps to avoid the use of non-public headers and
protocol-internal constants in external code (e.g., in jerry-port
and jerry-ext).

The patch also cleans up the necessary includes in jerry-core public
headers, and the include order in jerry-port/default public headers.

JerryScript-DCO-1.0-Signed-off-by: Akos Kiss akiss@inf.u-szeged.hu

jerry-core/debugger/debugger.h

@@ -212,6 +212,10 @@ typedef enum
 
 /**
  * Subtypes of output_result.
+ *
+ * Note:
+ *      This enum has to be kept in sync with jerry_log_level_t with an offset
+ *      of +2.
  */
 typedef enum
 {