[STAL-1960] Add console.log tests, special TreeSitterNode serialization

What problem are you trying to solve?

Currently, when calling console.log on a TreeSitterNode, we get the raw, internal representation, which is a bunch of integers.

Console logging is useful for debugging during the rule writing process, so it should output a more friendly helpful representation of a node.

Implement a custom JSON.stringify replacer function to serialize the node with helpful information like the CST node type and text.

// console.log(tsNode);
'{"id":0,"_startLine":1,"_startCol":7,"_endLine":1,"_endCol":10,"_typeId":1}'

// console.log(tsNode);
'{"type":"identifier","start":{"line":1,"col":7},"end":{"line":1,"col":10},"text":"abc"}'

Adding a toJSON or toString function to the TreeSitterNode class. I think the raw, internal representation is still useful to be able to inspect, so I only want to do the formatting on the DDSA_Console instead of globally.

This PR also adds tests for console.log on various JavaScript types (superseding these tests, which will be replaced in the PR that switches over to ddsa)

The stella console.log for the same node as above is:

// stella console.log(tsNode);
{"astType":"identifier","start":{"line":1,"col":7},"end":{"line":1,"col":10},"fieldName":null,"children":[]}