Adds environment variable for Single Redis Instance

[christianhelp]

Description

• The current setup for how our Redis (AKA Vercel KV) is that a key is set solely by its name. This name does not change between development / preview environments. For example, a key setting function currently looks await kv.sadd("config:navitemslist", encodeURIComponent(name)).
• Because of this, the current set up requires anyone who wishes to use Hackkit to have two separate instances: one for development and one for production. This creates a more difficult developer experience especially for those on free plans. This issue can easily be solved by prepending an environment variable that changes between environments to keep all of the keys in one database.

Requirements

• Create an environment variable called HK_ENV that allows for it to be set to "development" or "production" depending on the environment.
• Ensure this ENV is a part of the turbo.json under the globalEnv value so people using Hackkit will know that it is a required key
• Append the key to the redis calls so it will look something like the following

Notice that there is also an underscore that separates the env value from the key itself. The underscore was arbitrary and could also be something like a '-'. Up to developer discretion.

[linear]

HK-184 Prepend an environment variable allowing for a single Redis instance