feat: add config settings to support PR #72

[Kashkin]

Description

All of the actual work is over in craft-plugin-vite!

[khalwat]

Thanks for the PR! A few comments:

• I wonder if we can just use the manifestPath here rather than add a new dist property? They will both always point to the same thing, and we can just strip the manifest.json off of it, and things will "just work" without people needing to reconfigure anything or adding a mostly redundant additional config setting.

(In retrospect, it would have made sense from the beginning to have just a dist property, and determine the manifest from there but... alas that ship has sailed).

• This plugin has both a Craft v3 and a Craft v4 version, so I'll need to port any changes to develop to develop-v4 also, or you can do dual PRs

• The documentation needs to be updated for both Craft v3 and Craft v4

I'm happy to do the latter 2 bullet points, but want to figure out the first one before proceeding

[Kashkin]

I wonder if we can just use the manifestPath here rather than add a new dist property? They will both always point to the same thing, and we can just strip the manifest.json off of it, and things will "just work" without people needing to reconfigure anything or adding a mostly redundant additional config setting.

Stripping manifestPath makes sense to me! The new config does seem a bit redundant (isn't hindsight a bastard) and the impact will be minimal, as it only affects people using this new option!

[khalwat]

Do you want to make the changes to the PR? You have a test case that you can confirm works, ya?