feat: configure kv binding name with env var

[james-elicx]

Changes

• Defaults the __OPENNEXT_KV_BINDING_NAME env var to the default kv name.
  • The typescript types mark this variable as defined due to its use for inlining in the cache handler, so defaulting the env var itself makes sense I think.
• Uses the env var in the config for the kv name.
• Adds more context to the cache handler patch.

docs pr: https://github.com/opennextjs/docs/pull/24

[changeset-bot[bot]]

🦋 Changeset detected

Latest commit: 7febc5d5773f928d9557ad7a3f2f2a57500091d9

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

| Name | Type | | ---------------------- | ----- | | @opennextjs/cloudflare | Minor |

Not sure what this means? Click here to learn what changesets are.

Click here if you're a maintainer who wants to add another changeset to this PR

[pkg-pr-new[bot]]

Open in Stackblitz

pnpm add https://pkg.pr.new/@opennextjs/cloudflare@83

commit: 7febc5d