move stuff to src folder, clarify readme

README.md

@@ -4,4 +4,4 @@ Wiki bot for https://ffxiv.consolegameswiki.com that attempts to fix items in [C
 
 ## Usage
 
-You'll need Node.js and npm. Install dependencies via `npm ci`, set `MW_USERNAME` and `MW_PASSWORD` to your account username and bot password respectively, then run `node edb-id-bot.mjs`.
+You'll need a recent version of Node.js (22+). Install dependencies via `npm ci`, set the `MW_USERNAME` and `MW_PASSWORD` environment variables to your account username and [bot password](https://www.mediawiki.org/wiki/Manual:Bot_passwords) respectively, then run `node src/index.mjs`.