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

software/zig_main/include/bt_stubs.h

@@ -0,0 +1,30 @@
+/* bt_stubs.h — Static inline wrappers for BT macros that zig translate-c
+ * cannot handle directly.
+ *
+ * Included by stubs.h AFTER bindings.h (which pulls in esp_bt.h).
+ * The translate-c pipeline converts these into callable Zig functions
+ * inside idf-sys.zig.
+ */
+
+#ifndef BT_STUBS_H
+#define BT_STUBS_H
+
+#ifndef CONFIG_IDF_TARGET_ESP32S2 /* No BT in ESP32-S2 */
+#ifdef CONFIG_BT_ENABLED
+
+/*
+ * BT_CONTROLLER_INIT_CONFIG_DEFAULT() is a macro that expands to a
+ * designated-initialiser struct literal — translate-c chokes on it.
+ * Wrapping it in a static inline function lets the C preprocessor
+ * expand the macro before translate-c sees the AST.
+ */
+static inline esp_bt_controller_config_t zig_bt_controller_default_cfg(void)
+{
+    esp_bt_controller_config_t cfg = BT_CONTROLLER_INIT_CONFIG_DEFAULT();
+    return cfg;
+}
+
+#endif /* CONFIG_BT_ENABLED */
+#endif /* !CONFIG_IDF_TARGET_ESP32S2 */
+
+#endif /* BT_STUBS_H */