feat(rules/link_implicit): implicit links parsing

http://diplodoc.com would not be parsed as link without wrapping it in links syntax

e.g: `[http://diplodoc.com](http://diplodoc.com)` or ``

[playground link](https://diplodoc-platform.github.io/playground/?input=not%2520a%2520link%3A%2520http%3A%2F%2Fdiplodoc.com%250A%250Acommonmark%2520autolink%3A%2520%253Chttp%3A%2F%2Fdiplodoc.com%253E%2C%2520just%2520link%3A%2520%255Bhttp%3A%2F%2Fdiplodoc.com%255D%28http%3A%2F%2Fdiplodoc.com%29)

most platforms have text that makes a link transformed into links automatically, creating expectations from users to have that feature out of the box.

look into implementing plugin that will **parse text that looks like a link as link**

be cautious of performance degradation.

Start with the linked playground input and compare the plain URL with the existing CommonMark autolink examples. The issue names no source files or tests; done means text that looks like a link is parsed as a link without the reported performance degradation.

Written by the indexing model from the issue text.