[ABW-1268] CAP33 parse imported payloads

[CyonAlexRDX]

Jira ticket: ABW-1286

Description

This is an implementation of serialization and deserialization of CAP-33 the import string format between Olympia and Babylon wallets.

N.B. that Babylon clients only need to deserialize (parse), but I've implemented serialize so that I could generate test vectors for our consultants who maintain the Olympia wallet can use to verify their serialize implementation, as well as our Android client can use to verify its implementation of deserialize.

[kugel3]

This function feels like it should almost be using a RegexBuilder.

[CyonAlexRDX]

I did start impl using PF SwiftParsing, but they have rewritten it for Swift 5.8 and not worth having to change the impl once we are in Swift 5.8....

[kugel3]

Ah, but RegexBuilders are forever. And very easy to use.

[kugel3]

Since we're replacing all forbidden characters with the same thing, I think it is clearer to do it in one go, something like

	public static func _sanitize(name: NonEmptyString?) -> String {
		guard let name else { return "" }
		let result = name.rawValue.prefix(30).replacing(
			Olympia.Export.Separator.regex,
			with: Olympia.Export.accountNameForbiddenCharReplacement
		)
		return String(result)
	}

[kugel3]

where

	static public var regex: some RegexComponent {
		ChoiceOf {
			inter
			intra
			headerEnd
			accountNameEnd
		}
	}

Or some more compact version

[kugel3]

This scares me, could we replace it with a guard-throw, since the function is throwing?

[kugel3]

Very cool. I haven't tested it, I suppose I can't without an olympia account, or can I make one now? Just some small stylistic comments.