To create a local KV table for testing `TEST => {"hello", "sunshine"}`, you make: 1) a file `.mf/kv/TEST/hello`
with the content `sunshine`. 2) For metadata, the file `.mf/kv/TEST/hello.meta.json` =>
`{"key":"hello","metadata":{"meta":"data"}}`
If you need to add more complex data, you can write a worker or script that puts that data in the file for you.
Be aware that when the key has `/` in it, then this will create folder structures. Todo find out how special
characters such as space and percent% and hash# and colon: is handled.
npx wrangler pages dev . --kv TEST --binding COLOR="red" --binding USER_PASS="hello:sunshine"