Start on dart support

src/process.ts

@@ -13,6 +13,7 @@ import {
 import { CSharpTarget } from "./targets/csharp";
 import { RustTarget } from "./targets/rust";
 import { ZIGTarget } from "./targets/zig";
+import { DartTarget } from "./targets/dart";
 
 class CatchedError extends Error {}
 
@@ -25,6 +26,7 @@ Targets.set("ts-node", NodeJSTypescriptTarget);
 Targets.set("c#", CSharpTarget as typeof CompileTarget);
 Targets.set("rust", RustTarget as typeof CompileTarget);
 Targets.set("zig", ZIGTarget as typeof CompileTarget);
+Targets.set("dart", DartTarget as typeof CompileTarget);
 
 function indexToLineAndCol(src: string, index: number) {
    let line = 1;