Refactor: move keyboards into kbdmania folder (#22714)

data/mappings/keyboard_aliases.hjson

@@ -975,6 +975,12 @@
     "keychron/q4": {
         "target": "keychron/q4/ansi/v1"
     }
+    "kmac": {
+        "target": "kbdmania/kmac"
+    }
+    "kmac_pad": {
+        "target": "kbdmania/kmac_pad"
+    }
     "kprepublic/bm40hsrgb": {
         "target": "kprepublic/bm40hsrgb/rev1"
     },

keyboards/kbdmania/kmac/readme.md

@@ -4,11 +4,11 @@ A Korean custom keyboard designed by Byungho Kim and the KBDMania community.
 
 Keyboard Maintainer: [Mathias Andersson](https://github.com/wraul)  
 Hardware Supported: KMAC & KMAC 2  
-Hardware Availability: http://www.kbdmania.net/xe/news/5232321
+Hardware Availability: [KBDMania](http://www.kbdmania.net/xe/news/5232321)
 
 Make example for this keyboard (after setting up your build environment):
 
-    make kmac:default
+    make kbdmania/kmac: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/kbdmania/kmac_pad/readme.md

@@ -7,15 +7,15 @@ It can be used independently, but can also be used by connecting with KMAC keybo
 
 * Keyboard Maintainer: [talsu](https://github.com/talsu)
 * Hardware Supported: KMAC PAD
-* Hardware Availability: http://www.kbdmania.net/xe/news/5232321
+* Hardware Availability: [KBDMania](http://www.kbdmania.net/xe/news/5232321)
 
 Make example for this keyboard (after setting up your build environment):
 
-    make kmac_pad:default
+    make kbdmania/kmac_pad:default
     
 Flashing example for this keyboard:
 
-    make kmac_pad:default:flash
+    make kbdmania/kmac_pad:default:flash
 
 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).