I've developed an extension for VsCode, specifically for Rust users!
The extension aims to automatically manage Rust modules (mod.rd). While there are extensions that do this more manually, Rust AutoMod manages this automatically for you!
The extension is automatically activated when the editor identifies the language as Rust, so you don't need to worry about activating it manually (for now, as it's somewhat intrusive).
AutoMod automatically creates mod files when they don't exist in a folder context, and adds new files from the context to the mod, with the default behavior "pub mod mymod;".