Added Annotation Lab

[diatrambitas]

A free tool for text annotation

Contribution Guidelines

Please ensure your pull request adheres to the following guidelines:

• Search previous suggestions before making a new one, as yours may be a duplicate.
• Make an individual pull request for each suggestion.
• Use the following format: Bookmark Title: Description.
• The title usually consists of several words. For bookmarks of an article or tutorial, use the title of the article.
• The description consists of one-two sentences about the bookmark. It is required.
• If the resource has 2 or more links please provide the Github repo link.
• Additions should be added to the bottom of the relevant category.
• New categories or improvements to the existing categorization are welcome.
• Check your spelling and grammar.
• Make sure your text editor is set to remove trailing whitespace.
• The pull request and commit should have a useful title.

Thank you for your suggestions!