Add README

Author: Mathias Amnell

README.md

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+
+# TaskLoadingAggregate
+
+### *Track your Swift Concurrency Tasks activity in an aggregate with ease.*
+
+## 📄 Description
+Swift's Concurrency makes working with asynchronous tasks through async/await a breeze. Hooking up a loading state for one task is just as easy. But what if you have multiple tasks running? Tracking one single loading state in those cases is a bit harder.
+
+### Introducing `TaskLoadingAggregate` 🎉
+
+TaskLoadingAggregate makes this a breeze by creating a loading state aggregate for your tasks. Each tracked task will report their status to the aggregate and as long as a task is loading the aggregate will report `isLoading` as `true`.
+
+## 🎮 Usage
+
+Hooking up a task to a TaskLoadingAggregate is as simple as:
+
+``` swift
+let loadingAggregate = TaskLoadingAggregate()
+
+// First task
+Task {
+    try await doSomething()
+}.track(loadingManager)
+
+// Second task
+Task {
+    try await doSomethingElse()
+}.track(loadingManager)
+
+// You can now bind your UI or whatever to loadingAggregate's @Published isLoading property 🚀
+```
+
+#### Q: *Is this only for `Task`?*
+
+No, you can use a TaskLoadingAggregate however you like, but then it is up to you to increment and decrement the aggregates loading counter:
+
+``` swift
+let loadingAggregate = TaskLoadingAggregate()
+
+// In async function
+func doSomething() async {
+    loadingAggregate.increment()
+    await doSomethingElse()
+    loadingAggregate.decrement()
+}
+
+// In classic closure
+loadingAggregate.increment()
+self.doSomething(completion: {
+    loadingAggregate.decrement()
+})
+```
+
+## 😋 Who cooked it?
+
+[![@amnell][twitter-image]](https://twitter.com/amnell) [![amnell][github-image]](https://github.com/amnell)
+
+## ⚖️ License
+
+**TaskLoadingAggregate** is generously distributed under the *[MIT](https://opensource.org/licenses/MIT)*.
+
+<!-- GitHub's Markdown reference links -->
+[twitter-image]: https://img.shields.io/badge/Twitter-1DA1F2?style=for-the-badge&logo=twitter&logoColor=white
+[github-image]: https://img.shields.io/badge/GitHub-100000?style=for-the-badge&logo=github&logoColor=white
+
+<!-- README generated with: https://github.com/pH-7/cool-readme-generator -->