Algorithm, Explanation and Example with Gif for Number of Islands #946
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Added a gif file to illustrate an example
An extra swift file was present hence deleted,
Added the last line.
Added a test file that can be used when running the code using Workspace rather than Playground
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Description
Number of islands is one of the problems that when solved makes you feel good and hence i decided to try and add it to this project. This is my first ever pull request, so hoping that everything that had been done, was right. Explained the solution, algorithm and also made a gif for better understanding for the users. Hope you like it. :)