docs: update monorepo readme

README.md

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+# Svelte Cloudinary Monorepo
+
+| Package                                         | Description                                                 |
+| ----------------------------------------------- | ----------------------------------------------------------- |
+| [svelte-cloudinary](packages/svelte-cloudinary) | [Documentation here](https://svelte.cloudinary.dev)         |
+| [playground](packages/playground)               | Development playground to experiment with svelte-cloudinary |
+| [docs](packages/docs)                           | Source for the [docs](https://svelte.cloudinary.dev)        |
+
+## Running Locally
+
+### Setup
+
+You'll first need to install [`pnpm@8`](https://pnpm.io/) and [`node@>18`](https://nodejs.org). Then, after cloning this repo, you can run:
+
+```bash
+pnpm install
+```
+
+Both the [playground](packages/playground) and [docs](packages/docs) need to have environment variables in order to run. You can find the template in the `.env.example` files located in each package. Simply create and fill out a `.env` file based on this template.
+
+### Developing
+
+You can run the packages in dev mode with the `pnpm dev` script. This will build `svelte-cloudinary` in watch mode, and run the docs/playground.
+
+### Scripts
+
+This is a list of the top-level scripts available, which can be run with `pnpm run <script-name>`:
+
+| Script Name | Description |
+| --- | --- |
+| `dev` | Run all the packages in dev mode - starts the playground/docs, and builds svelte-cloudinary |
+| `build` | Builds every package/site in the monorepo |
+| `package` | Just build `svelte-cloudinary` | 
+| `lint` | Check the codebase is following the style guide |
+| `test` | Runs the automated test suite |
+| `check` | Runs `svelte-check` and `astro-check` to find TypeScript/a11y errors |
+| `format` | Format the codebase with prettier |
+
+## Contributing
+
+Please take a look at our [contributing guide](./CONTRIBUTING.md).