Fix trailing spaces and missing newlines in all mcu-*.yaml files

Bulk cleanup: remove trailing whitespace and ensure files end with a
newline. Structural issues (indentation, bracket spacing) left for
per-file fixes.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

mcu-vehicle-honda-pcx125.yaml

@@ -50,7 +50,7 @@ external_components:
 packages:
   common: !include common/logger.yaml
 #   common: !include common/common.yaml
-  
+
 # debug:
 
 # PINOUTS: M5ATOM
@@ -132,4 +132,4 @@ light:
               call.set_brightness(0.01);
             }
             call.perform();
-            state = !state;
+            state = !state;