refactor: Fixes for soft-off based on review.

* Better naming for gpio-key behavior triggers.
* Tweaks to scanned behavior trigger to avoid bad semaphore use,
  and reduce chance of issues with slowly scanned matrixes.
* Various code cleanups of style issues.

app/dts/behaviors/soft_off.dtsi

@@ -8,7 +8,6 @@
     behaviors {
         /omit-if-no-ref/ soft_off: soft_off {
             compatible = "zmk,behavior-soft-off";
-            label = "SOFTOFF";
             #binding-cells = <0>;
         };
     };

app/dts/bindings/zmk,gpio-key-behavior-trigger.yaml

@@ -4,7 +4,7 @@
 description: |
   Driver for a dedicated key for invoking a connected behavior.
 
-compatible: "zmk,behavior-key"
+compatible: "zmk,gpio-key-behavior-trigger"
 
 include: base.yaml
 
@@ -16,7 +16,7 @@ properties:
   bindings:
     type: phandle
     required: true
-    description: The GPIO key that triggers wake via interrupt
+    description: The behavior to invoke when the GPIO key is pressed
   debounce-press-ms:
     type: int
     default: 5

app/dts/bindings/zmk,gpio-key-wakeup-trigger.yaml

@@ -4,7 +4,7 @@
 description: |
   Driver for a dedicated key for waking the device from sleep
 
-compatible: "zmk,wakeup-trigger-key"
+compatible: "zmk,gpio-key-wakeup-trigger"
 
 include: base.yaml
 

app/dts/bindings/zmk,gpio-scanned-key-behavior-trigger.yaml

@@ -4,7 +4,7 @@
 description: |
   Driver for a dedicated key triggered by matrix scanning for invoking a connected behavior.
 
-compatible: "zmk,behavior-key-scanned"
+compatible: "zmk,gpio-scanned-key-behavior-trigger"
 
 include: base.yaml
 
@@ -16,7 +16,7 @@ properties:
   bindings:
     type: phandle
     required: true
-    description: The GPIO key that triggers wake via interrupt
+    description: The behavior to invoke when the GPIO key is pressed
   debounce-press-ms:
     type: int
     default: 5

app/dts/bindings/zmk,soft-off-wakeup-sources.yaml

@@ -2,7 +2,7 @@
 # SPDX-License-Identifier: MIT
 
 description: |
-  Description of all possible wakeup-sources from a forces
+  Description of all possible wakeup-sources from a forced
   soft-off state.
 
 compatible: "zmk,soft-off-wakeup-sources"
@@ -11,4 +11,4 @@ properties:
   wakeup-sources:
     type: phandles
     required: true
-    description: List of wakeup-sources that should be enabled to wake the system from forces soft-off state.
+    description: List of wakeup-sources that should be enabled to wake the system from forced soft-off state.