Add additional bundle grouping options

This issue is a:

• Bug
• [ x] Feature suggestion
• Documentation issue
• Other (Please Specify)

Environment

Description

Let me preface this by saying I'm not 100% sure on this, but this is my understanding of the situation:

Currently, any module used in more than one page gets added to the single "shared" bundle. However, this might end up with modules used only on the PDP and PLP (for example) being loaded on every page.
I'm sure it wouldn't be simple to implement, but it would be useful to be able to produce additional bundles, such as a "catalog" bundle for modules common to PDP and PLP, a "shipping" bundle for modules common to cart and checkout, etc.

Expected result:

"shared" bundle reduced in size, with additional bundles for common functionally. In theory, this would provide a more optimal set of modules for each page.

Possible solutions:

Either allow the user to link pages, or work from a pre-defined set of linked pages.

No files, tests, or entry points are named. Start by locating the bundle-generation and page-grouping entry points in the repository, then determine how shared modules are selected. Done means supporting additional linked or predefined page groups that produce smaller shared output and bundles for common functionality.