Devicetree DTS and YAML format improvements (#492)

* **DevicetreeCompiler**
  * Binding properties now support default values.
  * Compiler returns meaningful exit codes and reports errors more clearly.
  * Stronger validation of device configurations with unified error handling.
  * Added integration tests and a dedicated Devicetree test workflow.

* **Changes**
  * Platform binding schemas updated: some fields made required, others gained explicit defaults.
  * Many device-tree files simplified by removing unused/placeholder pin and transfer-size entries.

* **Documentation**
  * Removed several outdated TODO items.

Buildscripts/DevicetreeCompiler/source/binding_files.py

@@ -1,4 +1,5 @@
 import os
+from .exception import DevicetreeException
 
 def find_bindings(directory_path: str) -> list[str]:
     yaml_files = []
@@ -14,6 +15,6 @@ def find_all_bindings(directory_paths: list[str]) -> list[str]:
     for directory_path in directory_paths:
         new_paths = find_bindings(directory_path)
         if len(new_paths) == 0:
-            raise Exception(f"No bindings found in {directory_path}")
+            raise DevicetreeException(f"No bindings found in {directory_path}")
         yaml_files += new_paths
     return yaml_files