chore: removes the last require() usages

[snebjorn]

This removes the last usages of legacy require paving the way for ESM

I had to bump the minimum required node version to 22.18.0. This is a breaking change.

Even though tests pass and no meaningful changes to samples were made, I doubt this will work for all users.

[melloware]

Ok I marked this for 7.14.0

[melloware]

Actually if this is that major should it be 8.0.0?

[snebjorn]

I added this to the orval package to make it clear that node 22.18.0 is the minimum.

"engines": {
  "node": ">=22.18.0"
},

I don't know what'll happen to bun and deno users. But we don't officially support those, right?

[melloware]

No i think all other package managers are "great if it works" and if people submit fixes we will accept them.

[Noyabronok]

Ok I marked this for 7.14.0

Per semver, breaking changes must get a major version bump