Get sub schema using parsed data for additional context

[imolorhe]

As mentioned in #132, the "calculated" sub schema for a path in the JSON document can change based on the values of other fields in the document. json-schema-library already has the feature to get schema with the data when the schema is dynamic.

To retrieve the data, I added best-effort-json-parser so we can get some data even if the JSON document isn't in a valid JSON state (which is going to be the case while writing the document). Given a document in the following state:

{
  "type": "Test_2",
  "props": {
    te
  }
}

it is able to retrieve the data as:

{
    "type": "Test_1",
    "props": {
        "te": null
    }
}

...which is sufficient context (at least for all the existing test cases)

Other changes in this PR include:

• deleted unused (old) json-completion.ts file
• created the DocumentParser type and moved parsers into a separate directory
• added loglevel for better log tracing (logs now point to the file the logs come from as opposed to debug.ts)

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Latest commit: c04ef4ffa58af3622d9bf4ba19048e4ff3931823

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

| Name | Type | | ---------------------- | ----- | | codemirror-json-schema | Patch |

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[acao]

oh I love this!

[acao]

@imolorhe my only question is, why do we make this disabled by default?

[imolorhe]

@acao didn't want to change more behavior than necessary. Enabling it by default causes a test case (json-validation > 'not handle invalid json') to fail because now it can handle invalid JSON. This behavior change is fine though so maybe we just enable it by default

[acao]

@imolorhe sounds good to me!

normally for > 0.x I would tag a new feature as a minor release, but with 0.x I think we just patch