Add 60_ansi_tsangan_split_bs_rshift to community layouts (#24186)

keyboards/studiokestra/cascade/keyboard.json

@@ -51,6 +51,9 @@
     "diode_direction": "COL2ROW",
     "processor": "atmega32u4",
     "bootloader": "atmel-dfu",
+    "layout_aliases": {
+        "LAYOUT_60_tsangan_hhkb": "LAYOUT_60_ansi_tsangan_split_bs_rshift"
+    },
     "layouts": {
         "LAYOUT_all": {
             "layout": [
@@ -192,7 +195,7 @@
                 {"matrix": [4, 13], "x": 13.75, "y": 4, "w": 1.25}
             ]
         },
-        "LAYOUT_60_tsangan_hhkb": {
+        "LAYOUT_60_ansi_tsangan_split_bs_rshift": {
             "layout": [
                 {"matrix": [0, 0], "x": 0, "y": 0},
                 {"matrix": [0, 1], "x": 1, "y": 0},