Add EuroNext, Next40, and Next120 company listings as a new datapoint

We need to integrate major European stock market indices, including EuroNext, Next40, and Next120, into our company profiles. This will allow users to identify publicly traded companies in these indices and enhance segmentation for financial and investment purposes.

🔹 Why?

• Provides valuable financial insights for investors and analysts.

• Enhances company categorization by stock market indices.

• Allows users to filter and analyze companies based on their market presence.

🔹 How it works?

1. Determine the correct datapoint name:

• Suggestion: stock_index_membership

• Example format:

{ "stock_index_membership": ["Euronext", "Next40", "Next120"] }

2. Find reliable data sources:

• Use official Euronext APIs, stock exchange websites, or financial databases.

• Scrape or periodically update Next40 & Next120 listings from their respective sources.

3. Integrate data into company profiles:

• Store index membership as an array for companies.

• Ensure data updates dynamically as companies enter or exit these indices.

4. Allow API search & filtering:

• Enable users to search for companies by index membership.

• Add a filter in the UI to display relevant stock-listed companies.

5. Ensure periodic updates:

• Implement an automatic update system to reflect quarterly changes.

• Cross-check with official sources to maintain accuracy.

6. Test UI & API implementations:

• Ensure companies display the correct stock index affiliations.

• Validate data accuracy before deployment.