[#1301] Save pages as JS, remove eval

[bringking]

Subtasks

• Save pages as plain JS
• Fetch JS pages from the router
• Handle 404 pages
• Handle status codes
• Send the initial JS/JSON with the __NEXT_DATA__ payload

Related Issue

#1301

Related PRs -

For reference, this work started here - #1548 -> and is now being worked by @arunoda - #1611

[arunoda]

Hey actually, I was playing with your code and try to experiment a bit.
So, I came up with this: #1611

After looking at all, I think it's kind better me to work on this feature, since it involves a lot of core changes.
I really need your help and ideas to review #1611 as we proceed.

[bringking]

@arunoda that sounds like a good plan, it was quite a bit to bite off! I will definitely lend my 👀