Json de/serialization

[bendikberg]

Purpose

The current json serialization implementation relies on using regexes and string replacement to fix up and change json files on read and write. It also serializes, deserializes then serializes the json again in some cases. This PR attempts to get around this by skipping some of the intermediate steps by using more Newtonsoft.Json features, like the SerializationBinder and a custom Json reader and writer.

Using more Newtonsoft.Json features also increases the flexibility if future changes to the json serialization is needed.

Performance

Input and Ouput parsing improvements for large graphs by using a dictionary to lookup nodes while deserializing.
Less .ToArray and .ToList copying.
Less string replacements during de/serialize.

Declarations

Check these if you believe they are true

• The codebase is in a better state after this PR
• Is documented according to the standards
• The level of testing this PR includes is appropriate
• User facing strings, if any, are extracted into *.resx files
• All tests pass using the self-service CI.
• Snapshot of UI changes, if any.
• Changes to the API follow Semantic Versioning and are documented in the API Changes document.
• This PR modifies some build requirements and the readme is updated
• This PR contains no files larger than 50 MB

Release Notes

N/A

Reviewers

@mjkkirschner

FYIs

@dimven