Vendor esp-idf-rc522 as plain source instead of submodule

The library is modified (NDEF reading, cascade anticollision) so vendoring
it directly avoids needing push access to the upstream fork.

https://claude.ai/code/session_01MhAnh68DPNnTjcKqjNYDmk

device/components/esp-idf-rc522/rc522.h

@@ -0,0 +1,93 @@
+#pragma once
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include "driver/spi_master.h"
+
+#define RC522_DEFAULT_MISO                 (25)
+#define RC522_DEFAULT_MOSI                 (23)
+#define RC522_DEFAULT_SCK                  (19)
+#define RC522_DEFAULT_SDA                  (22)
+#define RC522_DEFAULT_SPI_HOST             (VSPI_HOST)
+#define RC522_DEFAULT_SCAN_INTERVAL_MS     (125)
+#define RC522_DEFAULT_TACK_STACK_SIZE      (4 * 1024)
+#define RC522_DEFAULT_TACK_STACK_PRIORITY  (4)
+
+typedef void(*rc522_tag_callback_t)(uint8_t*);
+
+/* Called when a tag is detected (url != NULL) or removed (sn == NULL, url == NULL).
+ * url is the NDEF URI record content, or NULL if no NDEF was found on the tag.
+ * The caller must NOT free sn or url — they are freed by the library. */
+typedef void(*rc522_ndef_callback_t)(uint8_t* sn, const char* url);
+
+typedef struct {
+    int miso_io;                    /*<! MFRC522 MISO gpio (Default: 25) */
+    int mosi_io;                    /*<! MFRC522 MOSI gpio (Default: 23) */
+    int sck_io;                     /*<! MFRC522 SCK gpio  (Default: 19) */
+    int sda_io;                     /*<! MFRC522 SDA gpio  (Default: 22) */
+    spi_host_device_t spi_host_id;  /*<! Default VSPI_HOST (SPI3) */
+    rc522_tag_callback_t callback;  /*<! Called with 5-byte serial number, or NULL when tag removed */
+    rc522_ndef_callback_t ndef_callback; /*<! Called with (sn, url) on tag change; url may be NULL */
+    uint16_t scan_interval_ms;      /*<! How fast will ESP32 scan for nearby tags, in miliseconds. Default: 125ms */
+    size_t task_stack_size;         /*<! Stack size of rc522 task (Default: 4 * 1024) */
+    uint8_t task_priority;          /*<! Priority of rc522 task (Default: 4) */
+} rc522_config_t;
+
+typedef rc522_config_t rc522_start_args_t;
+
+/**
+ * @brief Initialize RC522 module.
+ *        To start scanning tags - call rc522_resume or rc522_start2 function.
+ * @param config Configuration
+ * @return ESP_OK on success
+ */
+esp_err_t rc522_init(rc522_config_t* config);
+
+/**
+ * @brief Convert serial number (array of 5 bytes) to uint64_t number
+ * @param sn Serial number
+ * @return Serial number in number representation. If fail, 0 will be retured
+ */
+uint64_t rc522_sn_to_u64(uint8_t* sn);
+
+/**
+ * @brief Check if RC522 is inited
+ * @return true if RC522 is inited
+ */
+bool rc522_is_inited();
+
+/**
+ * @brief This function will call rc522_init function and immediately start to scan tags by calling rc522_resume function.
+ * @param start_args Configuration
+ * @return ESP_OK on success
+ */
+esp_err_t rc522_start(rc522_start_args_t start_args);
+
+/**
+ * @brief Start to scan tags. If already started, ESP_OK will just be returned.
+ * @return ESP_OK on success
+ */
+esp_err_t rc522_start2();
+
+/**
+ * @brief Start to scan tags. If already started, ESP_OK will just be returned.
+ * @return ESP_OK on success
+ */
+#define rc522_resume() rc522_start2()
+
+/**
+ * @brief Pause scan tags. If already paused, ESP_OK will just be returned.
+ * @return ESP_OK on success
+ */
+esp_err_t rc522_pause();
+
+/**
+ * @brief Destroy RC522 and free all resources
+ */
+void rc522_destroy();
+
+#ifdef __cplusplus
+}
+#endif