Add LENS to the list of toy projects

[impworks]

Please fill in this template:

• [x] Use a meaningful title for the pull request. Include the name of the resource added.
• [x] Add a short sentence on why do you think the resource you're adding is awesome!
• [x] Make sure your addition maintains the alphabtical order of the list.
• [x] Make sure your addition contains a description besides the link.