There are plans to create an official repository of Bitburner scripts. As of right now, this is not a priority and has not been started. However, if you'd like to contribute scripts now, you can find the repository here and submit pull requests.
One user created a Bitburner extension for the Visual Studio Code (VSCode) editor.
This extension includes several features such as:
- Dynamic RAM calculation
- RAM Usage breakdown
- Typescript definition files with jsdoc comments
- Netscript syntax highlighting
You can find more information and download links on this reddit post.