message: Move module declarations to top
diff: // - [ ] codespan diagnostics
  // - [ ] integration tests
  +pub mod env;
  +
  +pub mod core;
  +pub mod surface;
  +
  /// Interned strings.
  pub type StringId = string_interner::symbol::SymbolU16;
  @@ -68,8 +73,3 @@ impl ByteRange {
  self.start
  }
  }
  -
  -pub mod env;
  -
  -pub mod core;
  -pub mod surface;
  