Framework: Rename `client` to `app`

[ehg]

Since code in client/ will be used for server side rendering, as well as client side rendering. Now that we're getting rid of the shared/ dir — the name of the client/ directory is misleading. We should rename it to app.

I think we'll need to:

• Rename client -> app
• Find and replace client references with app
• Update external repos that depend on the client dir, for example wp-desktop
• Update any external docs
• Check the semantics of the top-level directory structure. Does server make sense? How do we define app/?

@mtias have I missed anything?

[gziolo]

What about this crazy idea:

• Rename client -> src
• Move server -> src/server
• Keep extensions in src/extensions
• Add src/desktop?

It would help whenever we need to use glob to search for JS files 😛

[coderkevin]

Oh man, that would be one huge PR.

[stale]

This issue has been marked as stale and will be closed in seven days. This happened because:

• It has been inactive in the past 9 months.
• It isn't a project or a milestone, and hasn’t been labeled `[Pri] Blocker`, `[Pri] High`, `[Status] Keep Open`, or `OSS Citizen`.

You can keep the issue open by adding a comment. If you do, please provide additional context and explain why you’d like it to remain open. You can also close the issue yourself — if you do, please add a brief explanation.

[flootr]

I think this would still be nice to have. What do you think @ehg?