feat: Add HTML Builder

[yikuansun]

Adding a new application

Checklist

• [x] I have read and completed the checklist of Submission Guide
• [x] My application is open-source and has been created for at least 20 days
• [ ] My application is closed-source and here is a proof it uses Electron:

Description

HTML Builder is a GUI tool which uses Electron and electron-builder to create desktop apps out of an HTML directory. The user just needs to select the folder containing index.html, and HTML Builder does the rest. The repo is at https://github.com/yikuansun/html-builder/