Update VSCode plugin

[xsebek]

• Update VSCode plugin NPM package
• Update VSCode syntax
  • Rewrite the definition rule to make it simpler and work with multiline types
    • Use shared #types group with added support for rec
  • Refactor groups to use ordered include patterns and unordered repository of named subgroups
  • Add escape sequences to strings
• Fix a typo in a regular expression that broke syntax highlighting
• Generate the syntax JSON file from YAML

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• Closes Update VSCode configuration to do syntax highlighting for tydef #1887

[xsebek]

@byorgey I changed the VSCode swarm syntax parts that I knew were outdated (tydef, case sensitive types) and tried to simplify it. It is still broken, because it stops too early on a line and does not highlight everything:

^{Note the missing highlighting for end after some other swarm code}

I will try to find out what is causing this problem and add more tests, so that this syntax does not rot again.
This old blog post from 2014 that complains about lack of documentation for TextMate grammar has some good insights:
https://www.apeth.com/nonblog/stories/textmatebundle.html

Also the JSON format without comments is annoying, I will have to setup YAML → JSON conversion. 😄