Added LICENSE and README.md

Author: nikarh

LICENSE

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+MIT License
+
+Copyright (c) 2023 Nikolay Arhipov
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

README.md

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+# Authelia plugin for Jellyfin
+
+[![License](https://img.shields.io/github/license/nikarh/jellyfin-plugin-authelia.svg)](https://github.com/nikarh/jellyfin-plugin-authelia)
+[![GitHub Actions Build Status](https://github.com/nikarh/jellyfin-plugin-authelia/actions/workflows/release.yml/badge.svg)](https://github.com/nikarh/jellyfin-plugin-authelia/actions/workflows/dotnet.yml)
+[![Current Release](https://img.shields.io/github/release/nikarh/jellyfin-plugin-authelia.svg)](https://github.com/nikarh/jellyfin-plugin-authelia/releases)
+[![Release RSS Feed](https://img.shields.io/badge/rss-releases-ffa500?logo=rss)](https://github.com/nikarh/jellyfin-plugin-authelia/releases.atom)
+[![Main Commits RSS Feed](https://img.shields.io/badge/rss-commits-ffa500?logo=rss)](https://github.com/nikarh/jellyfin-plugin-authelia/commits/main.atom)
+
+
+A plugin for Jellyfin that allows using [Authelia](https://www.authelia.com/) as an authentication and authorization backend.
+
+## 🤔 Description
+
+Unlike [SSO plugin](https://github.com/nikarh/jellyfin-plugin-authelia), this plugin uses [Authelia HTTP API](https://github.com/authelia/authelia/blob/master/api/openapi.yml).
+The benefit of that approach is a native Jellyfin form and API for authentication. This means that any existing Jellyfin client should work with this plugin/
+The drawback of this approach though is that only username+password authentication is supported (no 2FA).
+
+The plugin will automatically create a new Jellyfin user upon successful authentication. Any valid Authelia user can login to Jellyfin.
+
+## 🏗️ Usage
+
+1. Add `https://raw.githubusercontent.com/nikarh/jellyfin-plugin-authelia/main/manifest.json` as a new Jellyfin plugin repository
+2. Install `Authelia Authentication` plugin from catalog
+3. Configure the plugin by entering the URL of your Authelia server (can be either private or public), and a URL of your Jellyfin installation used in Authelia `configuration.yml` rule.