[catalog] add import example

[HerringtonDarkholme]

// Import the MongoClient from the mongodb package
import { MongoClient } from 'mongodb';

// Connection URL and Database Name
const url = 'mongodb://localhost:27017';
const dbName = 'myDatabase';

async function run() {
    // Create a new MongoClient
    const client = new MongoClient(url);

    try {
        // Connect to the MongoDB server
        await client.connect();
        console.log('Connected successfully to MongoDB');

        // Select the database
        const db = client.db(dbName);

        // Select the collection
        const collection = db.collection('myCollection');

        // Query the collection
        const documents = await collection.find({}).toArray();
        console.log('Documents retrieved:', documents);
    } catch (err) {
        console.error('An error occurred:', err);
    } finally {
        // Close the connection
        await client.close();
        console.log('Connection closed');
    }
}

// Run the function
run();

rule:
  # we want to highlight the usage of our imported module
  # so the usage is what we are actually going to match on.
  # to check against the import we will traverse from the usage all the way to the root of the doc
  # and then down to the import statement


  # the usage
  kind: identifier
  pattern: $MOD
  
  # its relationship to the root
  inside:
    stopBy: end
    kind: program

    # and back down to the import statement
    has:
      stopBy: end # we allow going multiple levels deep though we expect imports to be children of the root
      kind: import_statement

      # and deeper into the import statement looking for the matching identifier
      has:
        stopBy: end
        kind: import_specifier
        pattern: $MOD # same pattern as the usage is enforced here