static error reporting and handling

[petersalex27]

• [x] Errors, exceptional part of code that does terminate compilation, causing a compilation failure
• [x] Warnings, exceptional part of code that does not terminate compilation
• [ ] Logs, messages (not errors and not warnings) to provide user about code being compiled
• [ ] Message parts
  • [x] Header, e.g., Error (Syntax):
  • [x] Message, e.g., unexpected token
  • [ ] Suggestion(s), e.g., perhaps you meant '('
  • [x] Location, e.g., [./src/code.yew:103:8]
  • [ ] Code Snippet, e.g., 103 | func x [y] = y::x ^
• [ ] Allow errors (and other messages) to be reported asynchronously so parallelized compilation of projects works