message: implement inline source maps
diff: import { isUrl, merge, normalizePath, read } from "../core/utils.ts";
  +import { encode } from "../deps/base64.ts";
  import { Page } from "../core/filesystem.ts";
  import { basename, join, toFileUrl } from "../deps/path.ts";
  @@ -51,8 +52,13 @@ export default function (userOptions?: Partial<Options>) {
  url.replace(sourceMap.sourceRoot!, "")
  );
  + // Inline the source map in the output file
  if (options.inline) {
  - throw new Error("Inline source maps are not supported yet");
  + const url = `data:application/json;charset=utf-8;base64,${
  + encode(JSON.stringify(sourceMap))
  + }`;
  + file.content += `\n/*# sourceMappingURL=${url} */`;
  + return;
  }
  // Create a source map file
  