Rider plugin

Hello, I am looking to write a plugin that adds a "Custom Button" in the "Help" menu of JetBrains Rider software. The functionality of this button is to refactor rename a series of class names within a text file. These classes belong to my C# Unity project. I have tried several plugin examples on GitHub, but it seems that they are not working. Each time I build, a .dll file is generated in the bin directory. I have tried using "Install Plugin From Disk" but nothing happens. There is very little documentation on Rider plugins available on the internet. Can someone tell me if this idea is achievable? If so, how can I implement it? I have spent a lot of time on this without finding a direction