feat: introduce based generator logic

[ovflowd]

Description

This PR introduces the base generator modules. This should be integrated together with the CLI Pull Request, as the CLI should pass the CLI options to the generators.

Validation

Please verify that the code works and that it is well documented.

Test snippet

import { resolve } from 'node:path';
import createGenerator from './src/generators.mjs';
import createLoader from './src/loader.mjs';
import createParser from './src/parser.mjs';

const { loadFiles } = createLoader();
const { parseApiDocs } = createParser();

const apiDocFiles = loadFiles('../node/doc/api/http.md');

const parsedApiDocs = await parseApiDocs(apiDocFiles);

const { runGenerators } = createGenerator(parsedApiDocs);

await runGenerators({
  generators: ['jsonSimple'],
  output: resolve('.'),
});

Notes: I assume the CLI script will pass the options gotten from the CLI args to the generator; The output property must be a resolved path, and generators the generators they passed on CLI.

[ovflowd]

@canerakdas is this PR good to go? I believe this needs to land first before your CLI PR