docs: add unmaintained section

This is for projects that are still interesting, but are somewhat
neglected.

README.md

@@ -156,7 +156,6 @@ Made something cool? Feel free to open a PR to add a new row to this table!
 | [skeeto/devdocs-lookup](https://github.com/skeeto/devdocs-lookup)                                       | Quick Emacs API lookup on DevDocs.                                     | [![Latest GitHub commit](https://img.shields.io/github/last-commit/skeeto/devdocs-lookup?logo=github&label)](https://github.com/skeeto/devdocs-lookup)                     |
 | [yannickglt/alfred-devdocs](https://github.com/yannickglt/alfred-devdocs)                               | Alfred workflow for DevDocs.                                           | [![Latest GitHub commit](https://img.shields.io/github/last-commit/yannickglt/alfred-devdocs?logo=github&label)](https://github.com/yannickglt/alfred-devdocs)             |
 | [waiting-for-dev/vim-www](https://github.com/waiting-for-dev/vim-www)                                   | Vim search plugin with DevDocs in its defaults.                        | [![Latest GitHub commit](https://img.shields.io/github/last-commit/waiting-for-dev/vim-www?logo=github&label)](https://github.com/waiting-for-dev/vim-www)                 |
-| [vscode-devdocs for VS Code](https://marketplace.visualstudio.com/items?itemName=akfish.vscode-devdocs) | VS Code plugin to open and search DevDocs inside VS Code.              | [![Latest GitHub commit](https://img.shields.io/github/last-commit/akfish/vscode-devdocs?logo=github&label)](https://github.com/akfish/vscode-devdocs)                     |
 | [devdocs for VS Code](https://marketplace.visualstudio.com/items?itemName=deibit.devdocs)               | VS Code plugin to open the browser to search selected text on DevDocs. | [![Latest GitHub commit](https://img.shields.io/github/last-commit/deibit/vscode-devdocs?logo=github&label)](https://github.com/deibit/vscode-devdocs)                     |
 | [egoist/devdocs-desktop](https://github.com/egoist/devdocs-desktop)                                     | Cross-platform desktop application for DevDocs.                        | [![Latest GitHub commit](https://img.shields.io/github/last-commit/egoist/devdocs-desktop?logo=github&label)](https://github.com/egoist/devdocs-desktop)                   |
 | [qwfy/doc-browser](https://github.com/qwfy/doc-browser)                                                 | Native Linux app that supports DevDocs docsets.                        | [![Latest GitHub commit](https://img.shields.io/github/last-commit/qwfy/doc-browser?logo=github&label)](https://github.com/qwfy/doc-browser)                               |
@@ -166,6 +165,13 @@ Made something cool? Feel free to open a PR to add a new row to this table!
 | [astoff/devdocs.el](https://github.com/astoff/devdocs.el)                                               | Emacs viewer for DevDocs                                               | [![Latest GitHub commit](https://img.shields.io/github/last-commit/astoff/devdocs.el?logo=github&label)](https://github.com/astoff/devdocs.el)                             |
 | [DevDocs Tab for VS Code](https://github.com/mohamed3nan/DevDocs-Tab)                                   | VS Code extension to search for documentation on DevDocs.io faster by displaying it in a tab inside VS Code.| [![Latest GitHub commit](https://img.shields.io/github/last-commit/mohamed3nan/DevDocs-Tab?logo=github&label)](https://github.com/mohamed3nan/DevDocs-Tab)                             |
 
+### Unmaintained projects
+
+Here are some older projects that, while they are not actively maintained, are still worth a look.
+
+| Project                                                                                                 | Description                                                            | Last commit                                                                                                                                                                |
+|---------------------------------------------------------------------------------------------------------|------------------------------------------------------------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
+| [vscode-devdocs for VS Code](https://marketplace.visualstudio.com/items?itemName=akfish.vscode-devdocs) | VS Code plugin to open and search DevDocs inside VS Code.              | [![Latest GitHub commit](https://img.shields.io/github/last-commit/akfish/vscode-devdocs?logo=github&label)](https://github.com/akfish/vscode-devdocs)                     |
 ## Copyright / License
 
 Copyright 2013–2021 Thibaut Courouble and [other contributors](https://github.com/freeCodeCamp/devdocs/graphs/contributors)