Added ECC signature pre-padding zero check
Removed OpenSSL i2d and d2i functions call
Added sha384,sha512 for ECC sign and verify
Updated test scripts for ECC256/384/521 and Brainpool256/384/512
Added script to use HSM OPTIGA Trust M as CA to issue certificate
Tested on Linux raspberrypi 6.1.21-v8+ with OpenSSL1.1.1n
Updated README.md