move demo page to their folder

doxygen/started_demo.md

@@ -43,6 +43,6 @@ void led_blinking_task( void * p_task_para )
 ~~~
 
 
-[//]: # (\subpage md_doxygen_started_build_demo)
-[//]: # (\subpage md_doxygen_started_device_demo)
-[//]: # (\subpage md_doxygen_started_host_demo)
+[//]: # (\subpage md_demos_readme)
+[//]: # (\subpage md_demos_device_readme)
+[//]: # (\subpage md_demos_host_readme)

tinyusb.Doxyfile

@@ -754,7 +754,10 @@ INPUT                  = doxygen \
                          tinyusb \
                          boards \
                          tests/readme.md \
-                         tools/readme.md
+                         tools/readme.md \
+                         demos/readme.md \
+                         demos/device/readme.md \
+                         demos/host/readme.md
 
 # This tag can be used to specify the character encoding of the source files
 # that doxygen parses. Internally doxygen uses the UTF-8 encoding. Doxygen uses