Parser and utilities for DartX. POC demo. WIP.

JSX alternative for packages like deact and jaspr.

TODO:

• Comments
• Lower component names
• Collections literal alternative:
  • <T>[t, ...] > listOf<T>(T t, ...)
  • <T>{t, ...} > setOf<T>(T t, ...)
  • <K, V>{k: v, ...} > mapOf<K, V>(k: v, ...)