[Core] Rework PS/2 driver selection (#17892)

* [Core] Rework PS/2 driver selection

Enabling and selecting PS/2 driver was using old approach,
so it was reworked to current approach, inspired by Serial
and WS2812 driver selections.

* [Keyboard] Update keyboards using PS/2 to use new PS/2 driver selection

* [Docs] Update PS/2 documentation to use new PS/2 driver selection

* Fix indentation

* [Core] Add PS2 to data driver

* Fix oversight in property name

Co-authored-by: Drashna Jaelre <drashna@live.com>

* Add PS/2 pins to data driven mappings

Co-authored-by: Drashna Jaelre <drashna@live.com>

data/schemas/keyboard.jsonschema

@@ -390,6 +390,20 @@
                 }
             }
         },
+        "ps2": {
+            "type": "object",
+            "additionalProperties": false,
+            "properties": {
+                "enabled": {"type": "boolean"},
+                "mouse_enabled": {"type": "boolean"},
+                "clock_pin": {"$ref": "qmk.definitions.v1#/mcu_pin"},
+                "data_pin": {"$ref": "qmk.definitions.v1#/mcu_pin"},
+                "driver": {
+                    "type": "string",
+                    "enum": ["busywait", "interrupt", "usart", "vendor"]
+                }
+            }
+        },
         "split": {
             "type": "object",
             "additionalProperties": false,