Would it be possible to get another tab like the "Solution" tab which would simply show all files in the filesystem structure, from the root of the project (or from a configurable "root")?
For example, I use Rider with Unity. In my Unity project's root directory, I have a README.md file (e.g., for showing on the front page of GitHub). However, in Rider, I can't really navigate to it easily or see it, except for clicking on the "Assembly-CSharp" little "Arrow Navigation" at the top of the screen under the top toolbar. Except - I have a ton of other .md files for documentation all over the place, and can't easily see them at a glance. Neither can I see my tons of .txt configuration files in /Assets/Resources/... that I would like to be easily able to navigate to and edit.
If I right click "Assembly-CSharp" and click Add -> Add Existing Item, I can get one thing at a time added to the Solution Explorer. However, for whatever reason, those eventually disappear (presumably Unity overwrites the solution configuration?).
So, please, give me an ordinary filesystem browser that I can edit all my non "solution" files in my Unity project.