Add README (#2)

* Add license

* Add README

* Add assets

LICENSE

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+Copyright (c) 2023 Ramon Torres
+
+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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+# SmoothGradient
+
+A SwiftUI framework for creating smooth gradients using easing functions.
+
+## Motivation
+
+Linear gradients tend to produce hard edges, which are more noticeable when transitioning between highly contrasting colors. This framework provides a simple way to create smoother gradients using easing functions.
+
+| Linear | Smooth |
+| --- | --- |
+| ![Linear Gradient](assets/linear_gradient.png) | ![Smooth Gradient](assets/smooth_gradient.png) |
+
+
+## Installation
+
+### Swift Package Manager
+
+Add the following to your `Package.swift` file:
+
+```swift
+.package(url: "https://github.com/raymondjavaxx/SmoothGradient.git", from: "1.0.0")
+```
+
+To add from Xcode, go to *File* -> *Add Package Dependencies...* and enter the URL above.
+
+### CocoaPods
+
+Add the following to your `Podfile`:
+
+```ruby
+pod 'SmoothGradient', '~> 1.0.0'
+```
+
+## Usage
+
+### Pre-iOS 17
+
+```swift
+import SmoothGradient
+
+struct ContentView: View {
+    var body: some View {
+        LinearGradient(
+            gradient: .smooth(from: .black, to: .white, curve: .easeInOut),
+            startPoint: .top,
+            endPoint: .bottom
+        )
+    }
+}
+```
+
+## iOS 17+
+
+```swift
+import SmoothGradient
+
+struct ContentView: View {
+    var body: some View {
+        SmoothLinearGradient(
+            from: .black,
+            to: .white,
+            curve: .easeInOut,
+            startPoint: .top,
+            endPoint: .bottom
+        )
+    }
+}
+```
+
+## License
+
+SmoothGradient is available under the MIT license. See the [LICENSE](LICENSE) file for more info.