[GSoC] Blog: move and improve reftable tests in the unit testing framework

Hello everyone, here is my blog post for the first week of GSoC's official Coding period: https://chand-ra.github.io/2024/06/02/Coding-Period-Week-1.html Please let me know if you have any sort of feedback. Posts for the rest of the weeks can be found here: https://chand-ra.github.io/