Add Gitea OTA firmware update, dual-slot partition layout, and Gitea Actions release workflow

components/rc522/internal/rc522_helpers_internal.h

@@ -0,0 +1,21 @@
+#pragma once
+
+#include <esp_err.h>
+#include <inttypes.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+uint32_t rc522_millis();
+
+void rc522_delay_ms(uint32_t ms);
+
+esp_err_t rc522_buffer_to_hex_str(
+    const uint8_t *buffer, uint8_t buffer_length, char *str_buffer, uint8_t str_buffer_length);
+
+esp_err_t rc522_nibbles(uint8_t byte, uint8_t *msb, uint8_t *lsb);
+
+#ifdef __cplusplus
+}
+#endif