[Keyboard] move marksard's boards to marksard/ (#15786)

keyboards/marksard/treadstone32/readme.md

@@ -10,9 +10,9 @@ Hardware Availability: links to where you can find this hardware
 
 Make example for this keyboard (after setting up your build environment):
 
-    make treadstone32:default
+    make marksard/treadstone32:default
     or
-    make treadstone32/lite:default
+    make marksard/treadstone32/lite:default
 
 See the [build environment setup](https://docs.qmk.fm/#/getting_started_build_tools) and the [make instructions](https://docs.qmk.fm/#/getting_started_make_guide) for more information. Brand new to QMK? Start with our [Complete Newbs Guide](https://docs.qmk.fm/#/newbs).
 

keyboards/marksard/treadstone48/treadstone48/readme.md

@@ -10,9 +10,9 @@ Hardware Availability: links to where you can find this hardware
 
 Make example for this keyboard (after setting up your build environment):
 
-    make treadstone48:default
+    make marksard/treadstone48:default
     or
-    make treadstone48/rev2:default
+    make marksard/treadstone48/rev2:default
 
 See the [build environment setup](https://docs.qmk.fm/#/getting_started_build_tools) and the [make instructions](https://docs.qmk.fm/#/getting_started_make_guide) for more information. Brand new to QMK? Start with our [Complete Newbs Guide](https://docs.qmk.fm/#/newbs).