refactor(kscan): Match direct GPIO driver to matrix driver

Rewrote the direct GPIO kscan driver to match the improvements made to
the matrix driver in 82cb762698 and
f946dc6893. It now uses the same
debouncing system as the matrix driver.

app/drivers/zephyr/dts/bindings/kscan/zmk,kscan-gpio-direct.yaml

@@ -12,5 +12,23 @@ properties:
     type: phandle-array
     required: true
   debounce-period:
+    type: int
+    required: false
+    deprecated: true
+    description: Deprecated. Use debounce-press-ms and debounce-release-ms instead.
+  debounce-press-ms:
     type: int
     default: 5
+    description: Debounce time for key press in milliseconds. Use 0 for eager debouncing.
+  debounce-release-ms:
+    type: int
+    default: 5
+    description: Debounce time for key release in milliseconds.
+  debounce-scan-period-ms:
+    type: int
+    default: 1
+    description: Time between reads in milliseconds when any key is pressed.
+  poll-period-ms:
+    type: int
+    default: 10
+    description: Time between reads in milliseconds when no key is pressed and ZMK_KSCAN_DIRECT_POLLING is enabled.