software development roadmap overview

i have no idea about its backend most of the thoughts i have is about its front end,

its front end should looks exactly like gitbook but i fount that gitbooks ui fully not better,
sidepanel in editor is not good, also there is a scrolling issue in published page, the side bar automatically scrolls if we scrolled center of page

problems in editor .js

the core editor i am going to use is editor.js javascript library, it provide a block editor.
we can extend it using plugins. i created a sample button plugin using AI and it worked
but there was a corner case. if we want to edit text in front of button then that is not possible,
also if we added button then we can't go outside of button. the cursor willbe trapped inside,. cursor always stays inside added button.that need some manuel coding fix

prebuilt code

so first i thought that i can write whole code, but i found a repo and it is what exactly i want , it is already opensource, we can use it and sell it because of use of permissive licence, it is not restricted anyway , the only requirement is we should show licence in binary and source code,
https://github.com/codex-team/codex.docs