this function bundles your deno-project's exports in-memory, using the blazing fast esbuild bundler, along with the useful esbuild-deno-loader default plugin.
the output of this function is an array of WritableFileConfig, consisting of the destination path and the content of the bundled javascript/css code (as a binary Uint8Array).

by default, this function reads your "deno.json" file's exports field, but you can manually modify the entryPoints by specifying them in the configuration's esbuild.entryPoints field.
take a look at BundleConfig to see what configuration options are available.