Add home route to client.js to reduce size of all route chunks

[samkelleher]

Reopens #1514 as the changes made in #1515 was reverted in #1571

The regression brings back large bundle sizes.

When opening the root page, the following chunks are added:
Without fix:

<script src="/assets/vendors.chunk.js"></script>
<script src="/assets/client.js"></script>
<script src="/assets/vendors~about~admin~contact~home~login~not-found~privacy~register.chunk.js"></script>
<script src="/assets/about~admin~contact~home~login~not-found~privacy~register.chunk.js"></script>
<script src="/assets/home.chunk.js"></script>

With fix:

<script src="/assets/vendors.chunk.js"></script>
<script src="/assets/client.js"></script>

[ulani]

@samkelleher thank you very much for crating this issue! Unfortunately, we have close it due to inactivity. Feel free to re-open it or join our Discord channel for discussion.

NOTE: The main branch has been updated with React Starter Kit v2, using JAM-style architecture.