Code modernisation

[TimothyMakkison]

Optimize and modernise code to be in parity with System.Guid

Modernisation

• Implement ISpanFormattable, IComparable, ISpanParsable<Ulid>, see Add ISpanFormattable for .NET 6 #35
• Remove unsafe/pinning code in favor of ref Unsafe see Guid.GetHashCode
• Add if BigEndian logic (Does this library supports big endian?)

Optimisation

• Use string.Create where possible
• Vectorize the ToGuid, public Ulid(Guid guid) shuffle.
• Vectorize equality Vectorize Equality #37
• Vectorize Comparison see Guid.FastCompareTo
• Consider vectorizing TryWriteStringify
• Vectorize internal Ulid(long timestampMilliseconds timestamp shuffling
• Vectorize internal Ulid(ReadOnlySpan<char> base32)
• Vectorize public DateTimeOffset Time

[github-actions]

This issue is stale because it has been open 180 days with no activity. Remove stale label or comment or this will be closed in 30 days.

[neuecc]

sorry for the delayed response, PR will check in next month.

[hadashiA]

#39 merged. Thanks!