(chore): update README

Author: fern-support

README.md

@@ -0,0 +1,57 @@
+# Vapi Ruby Library
+
+[![Gem Version](https://img.shields.io/badge/vapi-server-sdk-v0.0.3-red?logo=ruby)](https://rubygems.org/gems//vapi-server-sdk)
+
+The Vapi Ruby library provides access to the Vapi API from Ruby.
+
+## Documentation
+
+API reference documentation is available [here](https://docs.vapi.ai/).
+
+## Installation
+
+Install the gem and add to the application's Gemfile by executing:
+
+```sh
+bundle add vapi-server-sdk
+```
+
+If bundler is not being used to manage dependencies, install the gem by executing:
+
+```sh
+gem install vapi-server-sdk
+```
+
+## Usage
+
+```ruby
+require "vapi-server-sdk"
+
+client = Vapi::Client.new(
+  token: 'YOUR_TOKEN'
+)
+result = client.calls.create()
+```
+
+## Async Client 
+
+The SDK exposes an async client that you can use to make non-blocking requests. 
+
+```ruby
+require "vapi-server-sdk"
+
+client = Vapi::AsyncClient.new(
+  token: 'YOUR_TOKEN'
+)
+result = client.calls.create()
+```
+
+
+## Contributing
+
+While we value open-source contributions to this SDK, this library is generated programmatically. Additions made directly
+to this library would have to be moved over to our generation code, otherwise they would be overwritten upon the next
+generated release. Feel free to open a PR as a proof of concept, but know that we will not be able to merge it as-is. 
+We suggest opening an issue first to discuss with us!
+
+On the other hand, contributions to the README are always very welcome!