docs: mention kubo-rpc-client

[SgtPooki]

Tracking issue: ipfs/js-kubo-rpc-client#36
Parent issue: ipfs/js-kubo-rpc-client#6
Originating issue: ipfs/kubo#9125

This PR is intended to update the docs so that users will be pointed to kubo-rpc-client instead of ipfs-http-client when using Javascript/TypeScript to talk to Kubo.

fixes ipfs/js-kubo-rpc-client#36

Things for reviewers to check:

1. Confirm I didn't miss any areas that should be updated (old mentions that should be updated that aren't yet)
2. Confirm the added information is accurate and desired
3. Confirm that the language used is aligned with maintainers' intentions

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[BigLep]

We shouldn't block, but I added @achingbrain .

I also put the IPFS doc writer: @TMoMoreau .

[TMoMoreau]

This looks good to me.

[lidel]

lgtm, if we address small issues described below

[SgtPooki]

@TMoMoreau ready to merge after CI passes if you're good with the changes requested by lidel that I've addressed.

[BigLep]

@TMoMoreau / @SgtPooki : lets get this merged :)

[salmad3]

@TMoMoreau is out until mid next week. We can merge on his behalf. Just a small nit on how the APIs are referenced.

[salmad3]

@SgtPooki left a minor suggestion

[SgtPooki]

Thanks for pushing this over the line @DannyS03, the last few weeks have been wild