Create README.md

Author: jamesrochabrun

README.md

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+# PolyAI
+<img width="1202" alt="dragon" src="https://github.com/jamesrochabrun/PolyAI/assets/5378604/68caf665-6ac4-4623-b15a-93f3a4072dc1">
+
+![iOS 15+](https://img.shields.io/badge/iOS-15%2B-blue.svg)
+[![MIT license](https://img.shields.io/badge/License-MIT-blue.svg)](https://lbesson.mit-license.org/)
+[![swift-version](https://img.shields.io/badge/swift-5.9-brightgreen.svg)](https://github.com/apple/swift)
+[![swiftui-version](https://img.shields.io/badge/swiftui-brightgreen)](https://developer.apple.com/documentation/swiftui)
+[![xcode-version](https://img.shields.io/badge/xcode-15%20-brightgreen)](https://developer.apple.com/xcode/)
+[![swift-package-manager](https://img.shields.io/badge/package%20manager-compatible-brightgreen.svg?logo=data:image/svg+xml;base64,PD94bWwgdmVyc2lvbj0iMS4wIiBlbmNvZGluZz0iVVRGLTgiPz4KPHN2ZyB3aWR0aD0iNjJweCIgaGVpZ2h0PSI0OXB4IiB2aWV3Qm94PSIwIDAgNjIgNDkiIHZlcnNpb249IjEuMSIgeG1sbnM9Imh0dHA6Ly93d3cudzMub3JnLzIwMDAvc3ZnIiB4bWxuczp4bGluaz0iaHR0cDovL3d3dy53My5vcmcvMTk5OS94bGluayI+CiAgICA8IS0tIEdlbmVyYXRvcjogU2tldGNoIDYzLjEgKDkyNDUyKSAtIGh0dHBzOi8vc2tldGNoLmNvbSAtLT4KICAgIDx0aXRsZT5Hcm91cDwvdGl0bGU+CiAgICA8ZGVzYz5DcmVhdGVkIHdpdGggU2tldGNoLjwvZGVzYz4KICAgIDxnIGlkPSJQYWdlLTEiIHN0cm9rZT0ibm9uZSIgc3Ryb2tlLXdpZHRoPSIxIiBmaWxsPSJub25lIiBmaWxsLXJ1bGU9ImV2ZW5vZGQiPgogICAgICAgIDxnIGlkPSJHcm91cCIgZmlsbC1ydWxlPSJub256ZXJvIj4KICAgICAgICAgICAgPHBvbHlnb24gaWQ9IlBhdGgiIGZpbGw9IiNEQkI1NTEiIHBvaW50cz0iNTEuMzEwMzQ0OCAwIDEwLjY4OTY1NTIgMCAwIDEzLjUxNzI0MTQgMCA0OSA2MiA0OSA2MiAxMy41MTcyNDE0Ij48L3BvbHlnb24+CiAgICAgICAgICAgIDxwb2x5Z29uIGlkPSJQYXRoIiBmaWxsPSIjRjdFM0FGIiBwb2ludHM9IjI3IDI1IDMxIDI1IDM1IDI1IDM3IDI1IDM3IDE0IDI1IDE0IDI1IDI1Ij48L3BvbHlnb24+CiAgICAgICAgICAgIDxwb2x5Z29uIGlkPSJQYXRoIiBmaWxsPSIjRUZDNzVFIiBwb2ludHM9IjEwLjY4OTY1NTIgMCAwIDE0IDYyIDE0IDUxLjMxMDM0NDggMCI+PC9wb2x5Z29uPgogICAgICAgICAgICA8cG9seWdvbiBpZD0iUmVjdGFuZ2xlIiBmaWxsPSIjRjdFM0FGIiBwb2ludHM9IjI3IDAgMzUgMCAzNyAxNCAyNSAxNCI+PC9wb2x5Z29uPgogICAgICAgIDwvZz4KICAgIDwvZz4KPC9zdmc+)](https://github.com/apple/swift-package-manager)
+
+An open-source Swift package that simplifies LLM message completions, inspired by [liteLLM](https://litellm.ai/) and adapted for Swift developers, following Swift conventions.
+
+Call different LLM APIs using the OpenAI format; currently supporting OpenAI and Anthropic, with more models, including Gemini, coming soon.