{@inheritDoc ResolveImportMapFactoryConfig.importMap}
provide an optional function (or a static string) that returns the absolute path to the current working directory.
make sure that it always returns a posix-style path (i.e. uses "/" for directory separator, and not "\").
if this is left undefined, then we will leave it up to your runtime-environment's working-directory/path (provided by getRuntimeCwd).
here is a summary of what that would entail:
process.cwd() or Deno.cwd().window.location.href or globalThis.runtime.getURL("").
note that if you will be bundling code that imports from npm-packages,
you must have your ./node_modules/ folder directly under the working-directory that you provide in this field.
the configuration interface for the deno esbuild plugins suite denoPlugins.