Add experimental node.js instructions

Author: tom-sherman

packages/cli/README.md

@@ -54,3 +54,49 @@ lpm tree app.bsky.graph.defs --depth 3
 
 Resolves the tree of lexicons starting at a specific NSID. Denotes circular
 dependencies with a yellow circle.
+
+## ⚠️ Experimental Node.js Support
+
+Lpm is built using Deno but it's also possible to run it with Node.js. This is experimental for now as it's a bit fiddly to setup.
+
+First step is to install it with your package manager of choice:
+
+```bash
+# pnpm 10.9+
+pnpm add jsr:@lpm/cli
+
+# yarn 4.9+
+yarn add jsr:@lpm/cli
+
+# npm, bun, and older versions of yarn or pnpm
+npx jsr add @lpm/cli # replace npx with any of yarn dlx, pnpm dlx, or bunx
+```
+
+Note, above we don't install it globally, but rather as a project dependency. To run it, we can execute `./node_modules/@lpm/cli/bin.js`
+
+```bash
+node ./node_modules/@lpm/cli/bin.js --help
+```
+
+You can add a script to your `package.json` to make it easier to run:
+
+```json
+{
+  "scripts": {
+    "lpm": "node ./node_modules/@lpm/cli/bin.js"
+  }
+}
+```
+
+Then you can run it with:
+
+```bash
+# npm
+# Note the extra `--` that allows passing arguments to the script
+npm run lpm -- --version
+
+# pnpm/yarn/bun (no extra `--` needed)
+pnpm lpm --version
+yarn lpm --version
+bun lpm --version
+```