Dialogue Engine [meta]

[MichaelBelousov]

Create a "dialogue" engine that reads dialogue files (probably a JSON schema) and

• [x] create a JSON schema for the json flavor of dialogue files
• [x] create a library with a C API (see README c-api section for some ideatation)
• [x] build the project for all operating systems, architectures, and web assembly (woohoo zig)
• [x] add callback registering to c API
• [x] add variable editing to c api
• [x] handle all nodes
• [x] add participant, variable information