Refactor: move p3d keyboards (#22763)

Group standalone p3dstore keyboards into p3d folder

data/mappings/keyboard_aliases.hjson

@@ -894,6 +894,9 @@
     "espectro": {
         "target": "mechkeys/espectro"
     },
+    "eu_isolation": {
+        "target": "p3d/eu_isolation"
+    },
     "felix": {
         "target": "unikeyboard/felix"
     },
@@ -1224,6 +1227,9 @@
     "pw88": {
         "target": "smoll/pw88"
     },
+    "q4z": {
+        "target": "p3d/q4z"
+    },
     "qaz": {
         "target": "tominabox1/qaz"
     },
@@ -1359,6 +1365,9 @@
     "space_space/rev2": {
         "target": "qpockets/space_space/rev2"
     },
+    "spacey": {
+        "target": "p3d/spacey"
+    },
     "spiderisland/winry25tc": {
         "target": "winry/winry25tc"
     },
@@ -1389,6 +1398,9 @@
     "suihankey/split": {
         "target": "kakunpc/suihankey/split"
     },
+    "synapse": {
+        "target": "p3d/synapse"
+    },
     "the_ruler": {
         "target": "maple_computing/the_ruler"
     },
@@ -1410,6 +1422,9 @@
     "tronguylabs/m122_3270": {
         "target": "ibm/model_m_122/m122_3270/teensy"
     },
+    "tw40": {
+        "target": "p3d/tw40"
+    },
     "ua62": {
         "target": "nacly/ua62"
     },

keyboards/p3d/eu_isolation/readme.md

@@ -22,10 +22,10 @@ Enter the bootloader in 3 ways:
 
 Make example for this keyboard (after setting up your build environment):
 
-    make eu_isolation:default
+    make p3d/eu_isolation:default
 
 Flashing example for this keyboard:
 
-    make eu_isolation:default:flash
+    make p3d/eu_isolation: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).

keyboards/p3d/q4z/readme.md

@@ -11,10 +11,10 @@ this little board is ready for whatever a raging gamer can throw it at.
 
 Make example for this keyboard (after setting up your build environment):
 
-    make q4z:default
+    make p3d/q4z:default
 
 Flashing example for this keyboard:
 
-    make q4z:default:flash
+    make p3d/q4z: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).

keyboards/p3d/spacey/readme.md

@@ -6,14 +6,14 @@ Spacey, designed by Vanilla Keyboards is a 45/65% keyboard with a little persona
 
 * Keyboard Maintainer: [vanilla](https://github.com/vanillakeyboards)
 * Hardware Supported: Elite C, Spacey PCB plates and acrylic drop_in case
-* Hardware Availability: https://p3dstore.com/collections/ended-group-buys/products/spacey?variant=37742593147064 and https://keeb.io/products/elite-c-low-profile-version-usb-c-pro-micro-replacement-atmega32u4
+* Hardware Availability: [P3D Store](https://p3dstore.com/collections/ended-group-buys/products/spacey?variant=37742593147064)
 
 Make example for this keyboard (after setting up your build environment):
 
-    make spacey:default
+    make p3d/spacey:default
 
 Flashing example for this keyboard:
 
-    make spacey:default:flash
+    make p3d/spacey: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).