MAGE-1061 Sample mixins

[cammonro]

This PR updates our sample module for 3.15.0. I made an effort to organize things a little better and provided demonstrations of:

• Overriding core libraries now that algoliaBundle has been discontinued
• Using mixins with Autocomplete
• Using mixins with InstantSearch
• Using mixins with core utilities
• Facet modifications
• Selecting alternate template engines
• Stuffing the bundle for backward compatibility with custom hooks that may rely on it (basically just providing a shim for a possible edge case)

Maybe we can release this as a 1.4.0-beta.1 with 3.15.0-beta.2?

Please note that some of the functionality demonstrated here depends on changes introduced in: algolia/algoliasearch-magento-2#1689

[damcou]

Huge work ! 👏 This will help our users to use the hooks for sure (helpful for me as well 😄 )

Maybe we can release this as a 1.4.0-beta.1 with 3.15.0-beta.2?

Since 1.4.0 is linked with the 3.15.x version with the composer file, I think we are fine no ? I'm not a huge fan of adding even more complexity of our release process.

[cammonro]

Huge work ! 👏 This will help our users to use the hooks for sure (helpful for me as well 😄 )

Maybe we can release this as a 1.4.0-beta.1 with 3.15.0-beta.2?

Since 1.4.0 is linked with the 3.15.x version with the composer file, I think we are fine no ? I'm not a huge fan of adding even more complexity of our release process.

You're totally right! The dependency covers us here. Let's keep it simple then.