I want my devices to run on an OS/framework which allows everything to be scriptable. Data should be visualised using simple/consistent interface.

There will be events, Actions, variables, data-streams, etc and the operating system should provide easy interface to quickly create new programs which can

1. Visualize data streams (filterable) using simple interfaces(configurable)
2. Create scripts which can create custom events or custom actions which are just built upon existing events/actions.

In such a system, the focus of apps should not be to add fancy interfaces for simple things, but to register new events, actions, data streams, visualizers into the OS and maybe provide new templates to use these additions.

What have you tried searching till now ?

There are many options like GitHub pages, Vercel, Netlify, etc. which can be free.

Other like AWS, firebase, etc which can be costly.