1.新增msh组件（类Shell工具）。

components/Kconfig

@@ -1,3 +1,46 @@
-menu "No components configure"
+menu "Components configure"
+
+    # Msh
+    config MR_USING_MSH
+        bool "Use msh"
+        default y
+        help
+            "Use this option allows for the use of the shell."
+
+    menu "Msh configure"
+        depends on MR_USING_MSH
+        config MR_CFG_MSH_BUFSZ
+            int "Msh buffer size"
+            default 32
+            range 16 1024
+            help
+                "This option sets the buffer size used by the shell."
+
+        config MR_CFG_MSH_NAME_MAX
+            int "Msh command name max length"
+            default 8
+            range 8 64
+            help
+                "This option sets the max length of the command name."
+
+        config MR_CFG_MSH_ARGS_MAX
+            int "Msh argument max number"
+            default 4
+            range 1 16
+            help
+                "This option sets the max number of arguments."
+
+        config MR_CFG_MSH_PROMPT
+            string "Msh prompt"
+            default "msh>"
+            help
+                "This option sets the prompt of the shell."
+
+        config MR_USING_MSH_ECHO
+            bool "Use msh echo"
+            default y
+            help
+                "Use this option allows for the use of the echo in the msh."
+    endmenu
 
 endmenu