feat: add readme

README.md

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+# @mongodb-js/zstd
+
+Zstandard compression library for Node.js
+
+## Installation
+
+```
+npm install @mongodb-js/zstd
+```
+
+## Support matrix
+
+|                  | node12 | node14 | node16 | node17 |
+| ---------------- | ------ | ------ | ------ | ------ |
+| Windows x64      | ✓      | ✓      | ✓      | ✓      |
+| Windows arm64    | ✓      | ✓      | ✓      | ✓      |
+| macOS x64        | ✓      | ✓      | ✓      | ✓      |
+| macOS arm64      | ✓      | ✓      | ✓      | ✓      |
+| Linux x64 gnu    | ✓      | ✓      | ✓      | ✓      |
+| Linux x64 musl   | ✓      | ✓      | ✓      | ✓      |
+| Linux arm gnu    | ✓      | ✓      | ✓      | ✓      |
+| Linux arm64 gnu  | ✓      | ✓      | ✓      | ✓      |
+| Linux arm64 musl | ✓      | ✓      | ✓      | ✓      |
+| Android arm64    | ✓      | ✓      | ✓      | ✓      |
+| Android armv7    | ✓      | ✓      | ✓      | ✓      |
+| FreeBSD x64      | ✓      | ✓      | ✓      | ✓      |
+
+## API
+
+```ts
+export function compress(buffer: Buffer | ArrayBuffer | Uint8Array, level: number): Promise<Buffer>
+export function decompress(buffer: Buffer): Promise<Buffer>
+```
+
+### Bugs / Feature Requests
+
+Think you’ve found a bug? Want to see a new feature in `@mongodb-js/zstd`? Please open a
+case in our issue management tool, JIRA:
+
+- Create an account and login [jira.mongodb.org](https://jira.mongodb.org).
+- Navigate to the NODE project [jira.mongodb.org/browse/NODE](https://jira.mongodb.org/browse/NODE).
+- Click **Create Issue** - Please provide as much information as possible about the issue type and how to reproduce it.
+
+Bug reports in JIRA for all driver projects (i.e. NODE, PYTHON, CSHARP, JAVA) and the
+Core Server (i.e. SERVER) project are **public**.
+
+### Support / Feedback
+
+For issues with, questions about, or feedback for the library, please look into our [support channels](https://docs.mongodb.com/manual/support). Please do not email any of the driver developers directly with issues or questions - you're more likely to get an answer on the [MongoDB Community Forums](https://community.mongodb.com/tags/c/drivers-odms-connectors/7/node-js-driver).
+
+### Change Log
+
+Change history can be found in [`HISTORY.md`](https://github.com/mongodb-js/zstd/blob/HEAD/HISTORY.md).
+
+## Usage
+
+```ts
+import { compress, decompress } from '@mongodb-js/zstd';
+
+(async () => {
+  const buffer = Buffer.from('test');
+  const compressed = await compress(buffer, 10);
+  const decompressed = await decompress(compressed);
+})();
+```