Upstream a good default keymap for the Ferris handwired (#9926)

* Proper default keymap

* Update keyboards/handwired/ferris/keymaps/default/readme.md

keyboards/handwired/ferris/keymaps/json2crab.py

@@ -0,0 +1,76 @@
+#!/usr/bin/env python3
+
+import argparse
+import sys
+import json
+
+indent_level=4
+
+def parse_cli():
+    parser = argparse.ArgumentParser(description='Ferris keymap formatter')
+    parser.add_argument("--input", type=argparse.FileType('r'),
+        default=sys.stdin, help="Input keymap (json file produced by qmk configurator)")
+    return parser.parse_args()
+
+def col_index(key_index):
+    if key_index < 30:
+        col = key_index % 5
+    else:
+        col = key_index % 2
+    return col
+
+def format_layers(layers):
+    formatted = indent_level * " " + "\"layers\": [\n"
+    max_key_length = {}
+    for layer in layers:
+        for (index, keycode) in enumerate(layer):
+            col = col_index(index)
+            max_length = max_key_length.get(col)
+            if (not max_length) or len(keycode) > max_length:
+                max_key_length.update({col: len(keycode)})
+    for (layer_index, layer) in enumerate(layers):
+        formatted += 2 * indent_level * " "
+        formatted += "["
+        for (index, keycode) in enumerate(layer):
+            if index > 30 and index % 2 == 0 or index % 5 == 0 and index != 0:
+                formatted += (1 + 2 * indent_level) * " "
+            formatted += json.dumps(keycode)
+            if index == 33:
+                formatted += "\n"
+            elif index > 30 and index % 2 == 1 or index % 5 == 4:
+                formatted += ",\n"
+            else:
+                n_spaces = max_key_length[col_index(index)] - len(keycode)
+                formatted += n_spaces * " "
+                formatted += ", "
+            if index % 10 == 9:
+                formatted += "\n"
+        formatted += 2 * indent_level * " "
+        if layer_index < len(layers) - 1:
+            formatted += "],\n"
+        else:
+            formatted += "]\n"
+    formatted += indent_level * " "
+    formatted += "]"
+
+    return formatted
+
+def format_keymap(keymap_json):
+    formatted = "{"
+    for (index, k) in enumerate(keymap_json):
+        if k == "layers":
+            formatted += format_layers(keymap_json[k])
+        else:
+            formatted += f"{indent_level * ' '}{json.dumps(k)}: {json.dumps(keymap_json[k])}"
+        if index < len(keymap_json) - 1:
+            formatted += ","
+        formatted += "\n"
+    formatted += "}"
+    return formatted
+
+def main():
+    args=parse_cli()
+    keymap_json = json.loads(args.input.read())
+    print(format_keymap(keymap_json))
+
+main()