Add README and LICENSE files for project documentation and legal information

Author: DerKekser

LICENSE

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+Copyright (c) 2025 DerKekser
+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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+# Unity - CVar
+
+[CVar](https://github.com/DerKekser/unity-cvar) provides a flexible way to create console variables in Unity projects. With this system, you can mark fields, properties, and methods for console access using a simple attribute.
+
+## Contents
+- [Simple Example](#simple-example)
+- [Supported Types](#supported-types)
+- [Static Members](#static-members)
+- [Methods](#methods)
+- [Manual Registration](#manual-registration)
+- [Console](#console)
+    - [Creation](#creation)
+    - [Commands](#commands)
+- [Install](#install)
+    - [Install via Unity Package](#install-via-unity-package)
+    - [Install via git URL](#install-via-git-url)
+- [License](#license)
+
+### Simple Example
+
+Define a console variable by adding the `CVar` attribute to a field, property, or method:
+
+```csharp
+using Kekser.UnityCVar;
+using UnityEngine;
+
+public class PlayerSettings : MonoBehaviour
+{
+    [CVar("player_speed")]
+    private float _speed = 5.0f;
+
+    [CVar("player_health", "Sets the player's health")]
+    public int Health { get; private set; } = 100;
+}
+```
+### Supported Types
+
+The system supports various types by default, including:  
+- Basic types (int, float, bool, string)
+- Unity types (Vector2, Vector3, Vector4, Quaternion)
+### Creation
+
+### Static Members
+
+You can also mark static fields, properties, and methods as CVars:
+
+```csharp
+using Kekser.UnityCVar;
+
+public static class GameSettings
+{
+    [CVar("game_difficulty")]
+    private static int _difficulty = 1;
+
+    [CVar("game_debug_mode")]
+    private static bool DebugMode { get; set; } = false;
+}
+```
+### Methods
+
+Methods can also be marked with the CVar attribute:
+
+```csharp
+using Kekser.UnityCVar;
+using UnityEngine;
+
+public class GameController : MonoBehaviour
+{
+    [CVar("restart_game")]
+    private void RestartGame()
+    {
+        // Restart game
+    }
+
+    [CVar("add_score")]
+    private void AddScore(int points)
+    {
+        // Add points
+    }
+}
+```
+### Manual Registration
+
+You can manually register CVars by calling the `CVarAttributeCache.RegisterCVar` method:
+
+```csharp
+CVarAttributeCache.RegisterCVar(
+    "go_setactive",
+    "Enables or disables the current target GameObject (true/false)",
+    typeof(GameObject),
+    "SetActive"
+);
+```
+### Console
+
+#### Creation
+
+You can create a console by dragging the `Console_Prefab` prefab  from the `UnityCVarConsole` folder into your scene.
+
+#### Commands
+
+To view all available commands, type `con_list` in the console. You can also use `con_list <filter>` to filter the results.
+### Install
+
+#### Install via Unity Package
+
+Download the latest [release](https://github.com/DerKekser/unity-cvar/releases) and import the package into your Unity project.
+#### Install via git URL
+
+You can add this package to your project by adding these git URLs in the Package Manager:
+```
+https://github.com/DerKekser/unity-cvar.git?path=Assets/Kekser/UnityCVar
+https://github.com/DerKekser/unity-cvar.git?path=Assets/Kekser/UnityCVarConsole
+```
+![Package Manager](/Assets/Kekser/Screenshots/package_manager.png)
+### License
+
+This library is under the MIT License.