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

scripts/build_modbus_entity_parameters_pre.py

@@ -0,0 +1,40 @@
+from pathlib import Path
+import os
+Import("env")
+
+def create_dummy_modbus_header():
+    """Create a dummy modbus_entity_parameters.hpp so the first pass compiles."""
+    header_content = '''#include "modbus.h"
+#include "emsdevice.h"
+
+/*
+ * This file is auto-generated. Do not modify.
+*/
+
+// clang-format off
+
+namespace emsesp {
+
+using dt = EMSdevice::DeviceType;
+
+#define REGISTER_MAPPING(device_type, device_value_tag_type, long_name, modbus_register_offset, modbus_register_count) \\
+    { device_type, device_value_tag_type, long_name[0], modbus_register_offset, modbus_register_count }
+
+// IMPORTANT: This list MUST be ordered by keys "device_type", "device_value_tag_type" and "modbus_register_offset" in this order.
+const std::initializer_list<Modbus::EntityModbusInfo> Modbus::modbus_register_mappings = {};
+
+} // namespace emsesp
+
+// clang-format on
+'''
+    
+    header_path = Path("src") / "core" / "modbus_entity_parameters.hpp"
+    header_path.parent.mkdir(parents=True, exist_ok=True)
+    
+    with open(header_path, 'w') as f:
+        f.write(header_content)
+    
+    print(f"Created dummy header file: {header_path} ({os.path.getsize(header_path)} bytes)")
+
+if not (env.IsCleanTarget()):
+    create_dummy_modbus_header()