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SurveyJS
Open-Source JSON Form Builder to Create Dynamic Forms Right in Your App. With SurveyJS form UI libraries, you can build and style forms in a fully-integrated drag & drop form builder, render them in your JS app, and store form submission data in any backend, inc. PHP, ASP.NET Core, and Node.js.
As for messy logs in general, ns.disableLog() is your friend :) Particularly if you're printing message to the log yourself, it can really help to turn down the 'log spam' you sometimes get from the game.
You can find an official example script doing exactly this at https://github.com/bitburner-official/bitburner-scripts, look for monitor.js. And of course feel free to check out the other scripts as well, even if the script's functionality isn't what you're looking for, I often find inspiration or learn new things from checking out other people's scripts.