Add new helper protocols to dump to control which child nodes are included in the dump

[tahirmt]

Draft because it is based off of #58.

Motivation

The Current method of using CustomDumpReflectable can be used to include/exclude properties from the resulting dump but it requires implementing a custom mirror as described in

swift-custom-dump/Sources/CustomDump/CustomDumpReflectable.swift

Line 30 in c9b6b94

/// // omit token from logs

. So for example if someone wants to exclude one property from an object with 20 properties, it will require creating a map with 19 properties to create a custom mirror. With CustomDumpExcludedChildNodesProvider the same result can be achieved by 2-3 lines and a simple string based array.

Open to naming suggestions and improvements.

[stephencelis]

@tahirmt Thanks for these general explorations! Sorry to push back again on added protocol surface area, but we already think the 3 this repo ships with is a lot 😄

I wonder if there's a more general infrastructure we could provide for customization points like this. Like is there a concept similar to SwiftSyntax's Visitor, which could be used to fully customize how a dump is done for a given node. Might take more time to think about, but just wanted to give you an initial thought as a library maintainer.

[tahirmt]

I'm going to close this since this isn't something we want to introduce