package.json is copied from reflex.lock/ to .web/ without processing

[masenf]

Describe the bug
If the user removes the scripts or other sections that reflex puts into package.json during reflex init, a subsequent hot reload can result in the dev server not being able to start.

To Reproduce

1. reflex run
2. truncate -s 0 reflex.lock/package.json then touch a python file -> trigger hot reload
3. get the lockfile out of sync warning
4. exit reflex, delete reflex.lock
5. reflex run -> dev server cannot start since package.json is missing the scripts section

Expected behavior
Reflex shouldn't blindly copy package.json without ensuring the necessary dev scripts are in place.

[linear-code]

ENG-10331