Adding Q# execution scaffolding (#470)

Set up compiler with minimal end-to-end interface allowing the F5
execution of current Q# file open in editor, no debugging.

This PR uses the deprecated check call as a placeholder. Next PR will
sub out the compiler for the debugger, replacing the check call.

npm/src/browser.ts

@@ -164,6 +164,6 @@ export {
 export { default as samples } from "./samples.generated.js";
 export { type VSDiagnostic } from "./vsdiagnostic.js";
 export { log, type LogLevel };
-export type { ICompilerWorker };
+export type { ICompilerWorker, ICompiler };
 export type { ILanguageServiceWorker, ILanguageService };
 export { type LanguageServiceEvent } from "./language-service/language-service.js";