[Master] Issue-312 Update ViewedProduct to use incl.tax final price

[mamsincl]

render final price as include tax

Description

#312

Manual Testing Steps

Pre-Submission Checklist:

• You've updated the CHANGELOG following the steps here
• Internal Only - If this is a release, please confirm the following:
  • The links in the changelog have been updated to point towards the new versions
  • The version has been incremented in the following places: module.xml and composer.json

NOTE: Please use the Changelogger cli tool to manage versioned file upgrades.

[smoucka]

@mamsincl Thank you for your contribution! This looks good in concept.

Can you please create a new, additive property in the Viewed Product payload, FinalPriceVAT, which contains the final price inclusive of VAT? The current FinalPrice property should stay the same as it is currently.

Please update the CHANGELOG.md with a description of your changes as well.

Thank you!

[mamsincl]

ideally I'll be able to check this today evening