[Workers KV] Using Workers KV instead of KV

[Oxyjun]

Summary

KV text has been replaced to Workers KV.

E.g.

1. KV namespace -> Workers KV namespace
2. KV binding -> Workers KV binding

Things that didn't change: when "KV" can be used to mean general KV/other KV features not specific to Workers KV.

E.g.

1. KV store
2. KV pair
3. KV operations
4. KV key
5. Durable Object KV APIs

Screenshots (optional)

Documentation checklist

• The documentation style guide has been adhered to.
• If a larger change - such as adding a new page- an issue has been opened in relation to any incorrect or out of date information that this PR fixes.
• Files which have changed name or location have been allocated redirects.

[cloudflare-workers-and-pages]

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[thomasgauvin]

Thanks for creating this @Oxyjun.

For additional context:
This is part of an effort to be more consistent with our naming for this product, Workers KV. We should either be consistent with Workers KV, or rename the product to KV and then be consistent with KV. The current state of using both interchangeably can be confusing, especially when we have other KV interfaces such as DO's KV interface.

This PR (s/o Jun) refers to KV as Workers KV as that is the official name for the product at this time

[thomasgauvin]

@Oxyjun we should consider spelling out key-value when it makes sense, ie KV store
KV pair
KV operations
KV key

[Oxyjun]

This issue needs to be re-tackled when the Dashboard is ready. Otherwise, it'll run into merge conflicts continuously. Closing this PR for now.