Added readme

README.md

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+# NTween
+
+A simple library implementing tweens for [Odin language](https://odin-lang.org).
+
+There's already [flux-tween](https://github.com/odin-lang/Odin/blob/aa36ae01cf4e4d665fb190b9f00237dfad9d21ee/core/math/ease/ease.odin#L359) in the standard library,
+but it was somewhat difficult to understand at first so I've made one myself.
+
+## Features 
+
+- basic float values tweening
+- array values tweening (vec2 and vec3 for example)
+- supports easings from `core:math/ease`
+- callbacks after completion
+
+## Installing
+
+You can clone this repo inside of your project and then just import the library using `import ntween`
+
+## How it works?
+
+Check [examples](/examples). The callbacks one is not working right now but it's gonna be fixed.
+
+### Very basic example
+
+```odin
+package main
+
+import nt "ntween"
+import rl "vendor:raylib"
+import "core:math/ease"
+
+main :: proc() {
+    rl.InitWindow(800, 600, "hellope, tweens!")
+    
+    tw := nt.init(f32)
+    pos : f32 = 100.0
+    
+    nt.animate(&tw, &pos, 700, 2, ease.Ease.Bounce_Out)
+
+
+    for !rl.WindowShouldClose() {
+      delta := rl.GetFrameTime()
+      nt.process(&tw, delta)
+
+      rl.BeginDrawing()
+      rl.ClearBackground(rl.BLACK)
+      rl.DrawRectangleV({pos, 100}, {30, 30}, rl.WHITE)
+      rl.EndDrawing()
+    }
+}
+```