Added the zig_main project to software for zig based implementation of code for robot

software/zig_main/cmake/bindings.cmake

@@ -0,0 +1,32 @@
+# ────────────────────────────────────────────────────────────────────────────────
+# Helper for downloading / referencing esp-rs/esp-idf-sys bindings.h
+#
+# This file is part of a Zig + ESP-IDF project using translate-c.
+# It downloads the official bindings.h mega-header from esp-rs/esp-idf-sys
+# as a reference (helps when improving stubs.h or comparing generated bindings).
+#
+# Huge thanks to the esp-rs community for maintaining esp-idf-sys
+# Repository: https://github.com/esp-rs/esp-idf-sys
+# bindings.h:  https://github.com/esp-rs/esp-idf-sys/blob/master/src/include/esp-idf/bindings.h
+# ────────────────────────────────────────────────────────────────────────────────
+
+set(BINDINGS_URL
+    "https://raw.githubusercontent.com/esp-rs/esp-idf-sys/refs/heads/master/src/include/esp-idf/bindings.h"
+)
+set(BINDINGS_ESP_RS "${CMAKE_SOURCE_DIR}/include/bindings.h")
+if(NOT EXISTS "${BINDINGS_ESP_RS}")
+    file(DOWNLOAD ${BINDINGS_URL} ${BINDINGS_ESP_RS}
+        TLS_VERIFY ON
+        STATUS download_status
+        LOG download_log
+        TIMEOUT 15
+    )
+    list(GET download_status 0 status_code)
+    list(GET download_status 1 error_msg)
+    if(NOT status_code EQUAL 0)
+        message(FATAL_ERROR "Failed to download esp-idf/bindings.h\nStatus: ${status_code}\nError: ${error_msg}\nLog:\n${download_log}")
+    endif()
+    message(STATUS "Downloaded esp-idf/bindings.h => ${BINDINGS_ESP_RS}")
+else()
+    message(STATUS "esp-idf/bindings.h already exists => ${BINDINGS_ESP_RS}")
+endif()