Merge pull request #11 from brainwo/readme

docs: update README

README.md

@@ -1,3 +1,11 @@
+<img src="https://avatars.githubusercontent.com/u/96821265?s=200&v=4" height="100" alt="Open Spaced Repetition logo"/>
+
+&nbsp;
+
+[![Pub Version](https://img.shields.io/pub/v/fsrs?label=pub.dev&labelColor=333940&logo=dart)](https://pub.dev/packages/fsrs)
+[![License](https://img.shields.io/badge/License-MIT-brightgreen.svg)](https://github.com/open-spaced-repetition/dart-fsrs/blob/main/LICENSE)
+[![CI Status](https://img.shields.io/github/actions/workflow/status/open-spaced-repetition/dart-fsrs/dart.yml?branch=main&label=CI&labelColor=333940&logo=github)](https://github.com/open-spaced-repetition/dart-fsrs/actions/workflows/dart.yml)
+
 ## About The Project
 
 dart-fsrs is a Dart Package implements [Free Spaced Repetition Scheduler algorithm](https://github.com/open-spaced-repetition/free-spaced-repetition-scheduler). It helps developers apply FSRS in their flashcard apps.
@@ -11,6 +19,7 @@ dart pub add fsrs
 ## Usage
 
 Create a card and review it at a given time:
+
 ```dart
 import 'package:fsrs/fsrs.dart';
 
@@ -22,15 +31,16 @@ printSchedulingCards(schedulingCards);
 ```
 
 There are four ratings:
+
 ```dart
 Rating.again; // forget; incorrect response
 Rating.hard; // recall; correct response recalled with serious difficulty
 Rating.good; // recall; correct response after a hesitation
 Rating.easy; // recall; perfect response
 ```
 
-
 Get the new state of card for each rating:
+
 ```dart
 var cardAgain = schedulingCards[Rating.again]!.card;
 var cardHard = schedulingCards[Rating.hard]!.card;
@@ -39,6 +49,7 @@ var cardEasy = schedulingCards[Rating.easy]!.card;
 ```
 
 Get the scheduled days for each rating:
+
 ```dart
 cardAgain.scheduledDays;
 cardHard.scheduledDays;
@@ -47,21 +58,25 @@ cardEasy.scheduledDays;
 ```
 
 Update the card after rating `Good`:
+
 ```dart
 card = schedulingCards[Rating.good]!.card;
 ```
 
 Get the review log after rating `Good`:
+
 ```dart
 var reviewLog = schedulingCards[Rating.good]!.reviewLog;
 ```
 
 Get the due date for card:
+
 ```dart
 due = card.due
 ```
 
 There are four states:
+
 ```dart
 State.newState; // Never been studied
 State.learning; // Been studied for the first time recently
@@ -73,6 +88,6 @@ State.relearning; // Forgotten in review state
 
 Distributed under the MIT License. See `LICENSE` for more information.
 
-## More Info: 
-Port from [email protected]:open-spaced-repetition/py-fsrs.git
-commit: 1b4cbe4
+## More Info:
+
+Port from [open-spaced-repetition/py-fsrs@1b4cbe4](https://github.com/open-spaced-repetition/py-fsrs/tree/1b4cbe4)