Add CheatSheets plugin to third-party Run plugins documentation (#41952)

This PR adds the CheatSheets plugin to the third-party plugins
documentation in the General plugins section.

## CheatSheets Plugin
📚 CheatSheets for PowerToys Run - Find cheat sheets and command examples
instantly always at your fingertips with PowerToys Run plugin

![CheatSheets
Demo](https://github.com/ruslanlap/PowerToysRun-CheatSheets/blob/master/assets/demo-cheatsheets.gif)

This plugin enables users to instantly find cheat sheets and command
examples for various tools and programming languages without leaving
PowerToys Run.

### Features
- 🔍 Instant Search - Find commands and cheat sheets with fuzzy matching
- 📚 Multiple Sources - Integrates with tldr, cheat.sh, and offline cheat
sheets
- ⭐ Favorites System - Save and quickly access your most-used commands
- 📂 Categories - Browse commands by tool/language (git, docker, python,
etc.)
- 📊 Usage History - Tracks popular commands for quick access
- 💾 Smart Caching - Fast offline access with configurable cache duration
- 🎨 Modern UI - Beautiful WPF interface with theme adaptation
- 🔧 Offline Mode - Works without internet connection using cached data

## Link to plugin
- https://github.com/ruslanlap/PowerToysRun-CheatSheets

.github/actions/spell-check/allow/names.txt

@@ -210,6 +210,7 @@ capturevideosample
 cmdow
 Controlz
 cortana
+devhints
 dlnilsson
 fancymouse
 firefox
@@ -229,6 +230,7 @@ regedit
 roslyn
 Skia
 Spotify
+tldr
 Vanara
 wangyi
 WEX