Feature: Introduce DecodingOptions to allow non-default behavior overrides (e.g. less strict deserialization)

[Rkuro]

Before this PR

If I had an object that looked like this:

{
"foo-bar": "baz"
}

There is no way currently to deserialize this as a conjure object since the naming for conjure is limited to PascalCase and then converted from PascalCase to snake case, i.e. "FooBar" -> "foo_bar" which means that when we hit the decoder case we are silently missing the cases where it is "foo-bar" and I think this should be a capability of the library :)

After this PR

==COMMIT_MSG==
Allow hyphens to be deserialized into conjure objects (non-default)
==COMMIT_MSG==

Possible downsides?

[Rkuro]

changelog bot seems to be having trouble picking up the output of the form ^ - adding no-changelog as a workaround.