No way to access compilation output files

### Command

build, serve

### Description

I have an esbuild plugin that is resposible to collect outputFiles after compilation (using `onEnd` hook with `result.outputFiles`).

When using application builder (esbuild) with custom plugins there is no way to access full list of outputFiles, only those emitted by `main` entrypoint compilation. There is no way to access additional files emited by angular builder, such as `polyfills`, assets, styles etc.

Previously, with using webpack plugin, i was able to get full list of outputFiles by using `processAssets` compilation hook.

I need to list emited files, as this is only way to get full names with filenames hash.

MY point is to build something like manifest of compilation result output files.

### Describe the solution you'd like

I would like to be able to access all compilation files by esbuild plugin.

### Describe alternatives you've considered

An alternative could be to access output files as an result of builder output, currently `build` command only returns `{success: true}` without information about output files.

Inizia dai percorsi di build e serve dell’application builder e dall’hook onEnd del plugin esbuild, quindi esamina come viene attualmente esposto result.outputFiles. Determina come l’intero insieme emesso, inclusi polyfills, assets e styles, oppure il risultato del comando di build, dovrebbe esporre nomi di file con hash. Il lavoro è completo quando un consumer di un plugin o builder può accedere a tutti i file di output della compilazione per un manifest.

Scritto dal modello di indicizzazione a partire dal testo della issue.