Koffi-Fredysessie/BRVM ? reverse-engineered prompt

Build me an R package called BRVM that makes it easy to pull stock market data from the BRVM in a simple, friendly way.

I want users to be able to get a list of BRVM tickers with the company name, sector, and country, then fetch historical price data, trading volumes, and other useful market indicators for a chosen stock over a date range. Please make the package feel straightforward for researchers or investors who just want to load it, call a few functions, and get clean data back.

It should include good documentation, examples, and a basic vignette showing how to use it. If there are any current data source details or best practices needed, look them up online if you need to. Also make sure the package installs cleanly and has tests so the main functions work reliably.