[Keyboard] move prototypist boards into vendor folder (#15780)

keyboards/prototypist/allison/readme.md

@@ -10,6 +10,6 @@ A custom luxurious 60 with F-row and Macro
 
 Make example for this keyboard (after setting up your build environment):
 
-    make allison:default
+    make prototypist/allison: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/prototypist/allison_numpad/readme.md

@@ -10,6 +10,6 @@ A custom luxurious numpad to match Allison
 
 Make example for this keyboard (after setting up your build environment):
 
-    make allison_numpad:default
+    make prototypist/allison_numpad: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).