feat(bignum): Add initial hardware acceleration for modular multiplication

Author: AnthonyGrondin

esp-mbedtls-sys/headers/esp32s3/config.h

@@ -327,6 +327,7 @@
 //#define MBEDTLS_GCM_ALT
 //#define MBEDTLS_NIST_KW_ALT
 #define MBEDTLS_MPI_EXP_MOD_ALT_FALLBACK
+#define MBEDTLS_MPI_MUL_MPI_ALT
 //#define MBEDTLS_MD5_ALT
 //#define MBEDTLS_POLY1305_ALT
 //#define MBEDTLS_RIPEMD160_ALT