doc: doxygen: group debugging APIs

Create new group for debugging and move all debugging APIs under this
group.

Signed-off-by: Anas Nashif <anas.nashif@intel.com>

doc/_doxygen/groups.dox

@@ -39,6 +39,12 @@
 @{
 @}
 
+@brief Debug Services
+@defgroup debug Debug
+@ingroup os_services
+@{
+@}
+
 @brief Connectivity
 @defgroup connectivity Connectivity
 @{

include/zephyr/debug/coredump.h

@@ -29,7 +29,7 @@
  * @file
  *
  * @defgroup coredump_apis Coredump APIs
- * @ingroup os_services
+ * @ingroup debug
  * @brief Coredump APIs
  * @{
  */

include/zephyr/debug/coresight/cs_trace_defmt.h

@@ -14,6 +14,7 @@ extern "C" {
 
 /**
  * @defgroup coresight_apis Coresight APIs
+ * @ingroup debug
  * @{
  * @}
  * @defgroup cs_trace_defmt Coresight Trace Deformatter

include/zephyr/debug/cpu_load.h

@@ -14,7 +14,7 @@ extern "C" {
 #endif
 
 /** @defgroup cpu_load CPU load monitor
- *  @ingroup os_services
+ *  @ingroup debug
  *  @brief Module for monitoring CPU Load
  *
  *  This module allow monitoring of the CPU load.

include/zephyr/debug/mipi_stp_decoder.h

@@ -15,7 +15,7 @@ extern "C" {
 
 /**
  * @defgroup mipi_stp_decoder_apis STP Decoder API
- * @ingroup os_services
+ * @ingroup debug
  * @{
  */
 

include/zephyr/debug/symtab.h

@@ -15,7 +15,7 @@ extern "C" {
 
 /**
  * @defgroup symtab_apis Symbol Table API
- * @ingroup os_services
+ * @ingroup debug
  * @{
  */
 

include/zephyr/debug/thread_analyzer.h

@@ -15,7 +15,7 @@ extern "C" {
 #endif
 
 /** @defgroup thread_analyzer Thread analyzer
- *  @ingroup os_services
+ *  @ingroup debug
  *  @brief Module for analyzing threads
  *
  *  This module implements functions and the configuration that simplifies