add readme and dev steps

.gitignore

@@ -173,3 +173,6 @@ dist
 
 # Finder (MacOS) folder config
 .DS_Store
+types.js
+exporter.js
+

README.md

@@ -0,0 +1,28 @@
+# Offlineland.io's exporter thingy
+
+`exporter.js` is a console snippet to export your account from [Manyland](https://manyland.com) (creations, collections, snaps, etc), and potentially import it back to [Offlineland.io](https://offlineland.io)
+
+
+
+## For developers:
+
+The actual work is done on the `exporter.ts` file. To set up a dev env:
+
+- install Bun ([Bun](https://bun.sh)):
+- install dependencies:
+```bash
+bun install
+```
+-  run the compiler in watch mode:
+```bash
+bun run dev
+```
+
+When copy-pasting the built exporter.js, you'll need to be careful not to copy the first two lines:
+```js
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+```
+Typescript really really wants to include them and has no option not to, but it doesn't work in browser.
+
+(If you manage to have tsc pick up the type for Zod.infer without using the `import/export type ...` syntax, you're a god please help me)

package.json

@@ -3,7 +3,8 @@
   "module": "exporter.js",
   "type": "module",
   "scripts": {
-    "build": "tsc ; sed -i '1,2d' exporter.js"
+    "build": "tsc ; sed -i '1,2d' exporter.js",
+    "dev": "tsc --watch"
   },
   "devDependencies": {
     "bun-types": "latest"