Add encoder abstraction. (#21548)

data/mappings/info_rules.hjson

@@ -21,6 +21,7 @@
     "DEBOUNCE_TYPE": {"info_key": "build.debounce_type"},
     "EEPROM_DRIVER": {"info_key": "eeprom.driver"},
     "ENCODER_ENABLE": {"info_key": "encoder.enabled", "value_type": "bool"},
+    "ENCODER_DRIVER": {"info_key": "encoder.driver"},
     "FIRMWARE_FORMAT": {"info_key": "build.firmware_format"},
     "KEYBOARD_SHARED_EP": {"info_key": "usb.shared_endpoint.keyboard", "value_type": "bool"},
     "LAYOUTS": {"info_key": "community_layouts", "value_type": "list"},

data/schemas/keyboard.jsonschema

@@ -6,6 +6,10 @@
         "encoder_config": {
             "type": "object",
             "properties": {
+                "driver": {
+                    "type": "string",
+                    "enum": ["quadrature", "custom"]
+                },
                 "rotary": {
                     "type": "array",
                     "items": {