replace auto-gen of XLS doc files and Modbus with python

scripts/build_run_test.py

@@ -0,0 +1,46 @@
+import os
+import shutil
+import subprocess
+import sys
+Import("env")
+
+# Import the streaming function from the separate module
+from run_executable import run_with_streaming_input
+
+def get_python_executable():
+    """Get the appropriate Python executable for the current platform."""
+    # Try different Python executable names
+    python_names = ['python3', 'python', 'py']
+    
+    for name in python_names:
+        if shutil.which(name):
+            return name
+    
+    # Fallback to sys.executable if available
+    return sys.executable
+
+
+def build_run_test(source, target, env):
+    
+     # Get the executable path
+    program_path = source[0].get_abspath()
+
+    # Get output file and test command from environment variable or use defaults
+    output_file = os.path.join("docs", env.GetProjectOption("custom_output_file", "dump_default_output.txt"))
+    test_command = env.GetProjectOption("custom_test_command", "test entity_dump")
+
+    # run the test command and save the output to the output file
+    run_with_streaming_input(program_path, test_command, output_file)
+    
+    # if we have a post command defined run it
+    post_script = env.GetProjectOption("custom_post_script", None)    
+    if post_script:
+        print(f"Running post script: {post_script}")
+        python_exe = get_python_executable()
+        subprocess.run([python_exe, post_script, program_path], check=True)
+ 
+env.AddCustomTarget(
+    "build",
+    "$BUILD_DIR/${PROGNAME}$PROGSUFFIX",
+    build_run_test
+)