feat: exports kOpenSSFScorecardRestApi

[PierreDemailly]

As discussed here: NodeSecure/cli#164 (comment)

[fraxken]

@PierreDemailly Please rename variable. The convention using k is only applicable for local constant (if you export it from a module it should be in MAJ).

For example:

import * as scorecard from "@nodesecure/ossf-scorecard-sdk";

// BAD
console.log(scorecard.kOpenSSFScorecardRestApi);

// OK
console.log(scorecard.API_URL);

[fraxken]

@all-contributors please add @PierreDemailly for code

[allcontributors]

@fraxken

I've put up a pull request to add @PierreDemailly! 🎉