fix(ajax): add query params to fetch method

[Velorexe]

What is this for

In the CacheRequest object in the Ajax file the properties params are set, meaning that the init argument that gets passed to the fetch() method allows for the usage of the params property. This creates an illusion that the fetch() method automatically adds parameters to the request, resulting in query parameters being passed to the final URL that the Request is going to.

However, both the definition of Request and CacheRequest both miss the params property, so they won't be used. In the cacheManager there is a method that interacts with the params property of cached requests.

If this was intended behavior, then I can rebrand this PR as a feat instead, as this allows for extra easy usability of the fetch wrapper in the lion package.

Is this breaking

No, this only adds functionality, leaving the standard workflow intact.

What does this solve

My issue that has been open for a while: #2363

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Latest commit: ccc2404

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