Fix big endian support, add CI workflow #159

Job	Run time
Resolve wolfSSL version matrix	4s
pre-PQC (v5.8.0-stable)	55s
master (--enable-pqc)	2m 7s
master (--enable-mlkem only)	2m 5s
master (no flag, opt-in check)	1m 48s
latest stable (v5.9.2-stable)	51s
master (--enable-mldsa only)	2m 14s
	10m 4s

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