Adds Rakuten Affiliate Link Consent URL Param

[banderson623]

Rakuten expect's user consent URL parameters to be added to affiliate links. This small generator will look for Rakuten affiliate links and add the usPrivacyString-like consent param. Notably: it requires the usPrivacyString generator being available.

From their docs, the link should be appended like this:

To make this work intent-oriented, not vendor specific, the functionality this generator framework supports is externally named: addConsentParameterToCommerceLinks and is called with:

PrivacyCompliance.Generator.addConsentParameterToCommerceLinks()

If you are reviewing this, I'd love some help thinking about:

• Is this name right – to support additional commerce vendors and their consent requirements? Should it be less about consent requirements and more about privacy params? I am open to changing the name.
• URL param addition – to avoid any URL processing and destructuring into path, params, ... I simply looked to see if ? is present in the link, and if so, append the param with & else use ?. Logically this feels okay, but I am sure there are some holes in it.

[jplhomer]

Nice work, Brian! RE: both of your questions, I think the focus on consent params and the ? vs & logic is sound 👍