Migrate some DEFAULT_FOLDER to keyboard_aliases.hjson (#24915)

keyboards/converter/palm_usb/info.json

@@ -1,20 +0,0 @@
-{
-    "keyboard_name": "Stowaway Converter",
-    "manufacturer": "QMK",
-    "url": "",
-    "maintainer": "qmk",
-    "usb": {
-        "vid": "0xFEED",
-        "pid": "0x0001",
-        "device_version": "1.0.0"
-    },
-    "processor": "atmega32u4",
-    "bootloader": "caterina",
-    "features": {
-        "bootmagic": false,
-        "mousekey": false,
-        "extrakey": false,
-        "console": true,
-        "command": true
-    }
-}

keyboards/converter/palm_usb/stowaway/keyboard.json

@@ -1,4 +1,22 @@
 {
+    "keyboard_name": "Stowaway Converter",
+    "manufacturer": "QMK",
+    "url": "",
+    "maintainer": "qmk",
+    "usb": {
+        "vid": "0xFEED",
+        "pid": "0x0001",
+        "device_version": "1.0.0"
+    },
+    "processor": "atmega32u4",
+    "bootloader": "caterina",
+    "features": {
+        "bootmagic": false,
+        "mousekey": false,
+        "extrakey": false,
+        "console": true,
+        "command": true
+    },
     "layouts": {
         "LAYOUT": {
             "layout": [

keyboards/converter/palm_usb/stowaway/rules.mk

@@ -3,5 +3,3 @@ CUSTOM_MATRIX = yes
 
 SRC += matrix.c
 UART_DRIVER_REQUIRED = yes
-
-DEFAULT_FOLDER = converter/palm_usb/stowaway