"force" a file to be splitted into multiple chunks?

Hey all,

I have a file from a dependency which contains a lot of exports:
```javascript
export const a...
export const b...
export const c...
export const d...
....
export const ...
```

This file is then being used from multiple places:
**file-a.js**
```javascript
import {a,d} from "../big-vendor-js-file.js"
```

**file-b.js**
```javascript
import {b,c} from "../big-vendor-js-file.js"
```

When using bundling with code splitting, this file is pretty much intact but extracted to a one large chunk.

Is there anyway to "force" esbuild to chop this file into smaller prices? Right now even though just a small fraction of this file is need every module reads all the contents because of that large chunk?

Reproduce the case with file-a.js, file-b.js, and big-vendor-js-file.js using esbuild's code splitting. Read the current chunking behavior and determine whether a supported option can separate the imported exports; done would require a clearly defined smaller-chunk result or an explicit documented limitation.

Written by the indexing model from the issue text.