doxygen: add prefix for groups (#9991)

* doxygen: add prefix for groups

Add "group_" prefix to doxygen group names. This makes
it easier to grep with group name later.

This patch only modifies the groups defined in the pathes
of INPUT of documentation/Doxyfile:

INPUT = . \
        ../src \
        ../include \
        ../components/finsh \
        ../components/drivers/include/drivers \
        ../components/drivers/clk \
        ../components/dfs/dfs_v2/src \
        ../components/dfs/dfs_v2/include

Other groups are not touched.

Signed-off-by: Chen Wang <unicorn_wang@outlook.com>

* ci: fixed error report when run file_check.py

Such as:
- "please delete extra space at the end of this line."
- "the RT-Thread error code should return negative value. e.g. return
  -RT_ERROR"

Signed-off-by: Chen Wang <unicorn_wang@outlook.com>

---------

Signed-off-by: Chen Wang <unicorn_wang@outlook.com>

documentation/0.doxygen/systeminit.h

@@ -3,7 +3,7 @@
  */
 
 /**
- * @defgroup SystemInit System Initialization
+ * @defgroup group_SystemInit System Initialization
  *
  * @brief System initialization procedure.
  *
@@ -47,7 +47,7 @@
  */
 
 /**
- * @ingroup SystemInit
+ * @ingroup group_SystemInit
  *
  * This function will initialize user application.
  *
@@ -58,6 +58,6 @@
 void rt_application_init();
 
 /**
- * @ingroup SystemInit
+ * @ingroup group_SystemInit
  */
 void rt_system_heap_init(void* begin_addr, void* end_addr);