feat(build): use blst packaged for zig using zig build system

[spiral-ladder]

Packaged blst for use by zig projects in this
repo, inspired by projects in allyourcodebase.

This also decouples managing blst options into that that repo's build.zig.

[spiral-ladder]

Had to update this name to match the output in build.zig.

[spiral-ladder]

note that I also removed building min_sig in this PR (which is inconsequential anyway because #49 does that as well)

[github-actions]

Performance Report

✔️ no performance regression detected

Full benchmark results

Benchmark suite	Current: 94ade28	Previous: null	Ratio
SecretKey.fromKeygen	2.4330 us/op
SecretKey serialization	659.00 ns/op
SecretKey deserialization	605.00 ns/op
SecretKey.toPublicKey	151.63 us/op
SecretKey.sign	484.84 us/op
PublicKey serialization	593.00 ns/op
PublicKey deserialize	18.242 us/op
PublicKey deserialize and validate - 1 keys	80.954 us/op
PublicKey deserialize and validate - 100 keys	8.0138 ms/op
PublicKey deserialize and validate - 10000 keys	800.70 ms/op
Signature serialization	938.00 ns/op
Signature deserialize	36.589 us/op
Signatures deserialize and validate - 1 sets	102.59 us/op
Signatures deserialize and validate - 100 sets	10.148 ms/op
Signatures deserialize and validate - 10000 sets	1.0168 s/op
aggregatePublicKeys - 1 sets	651.00 ns/op
aggregatePublicKeys - 8 sets	9.0510 us/op
aggregatePublicKeys - 32 sets	26.347 us/op
aggregatePublicKeys - 128 sets	96.079 us/op
aggregatePublicKeys - 256 sets	198.33 us/op
aggregateSignatures - 1 sets	743.00 ns/op
aggregateSignatures - 8 sets	15.781 us/op
aggregateSignatures - 32 sets	54.931 us/op
aggregateSignatures - 128 sets	211.06 us/op
aggregateSignatures - 256 sets	427.64 us/op
aggregateWithRandomness - 1 sets	264.76 us/op
aggregateWithRandomness - 16 sets	2.7015 ms/op
aggregateWithRandomness - 128 sets	16.970 ms/op
aggregateVerify - 1 sets	1.6513 ms/op
aggregateVerify - 8 sets	3.0902 ms/op
aggregateVerify - 32 sets	8.1653 ms/op
aggregateVerify - 128 sets	29.206 ms/op
verifyMultipleAggregateSignatures - 1 sets	1.8667 ms/op
verifyMultipleAggregateSignatures - 8 sets	3.6308 ms/op
verifyMultipleAggregateSignatures - 32 sets	10.375 ms/op
verifyMultipleAggregateSignatures - 128 sets	38.289 ms/op
Same message - 1 sets	1.8841 ms/op
Same message - 8 sets	2.6193 ms/op
Same message - 32 sets	5.1120 ms/op
Same message - 128 sets	15.117 ms/op
Same message - 256 sets	28.440 ms/op

by benchmarkbot/action