A terminal reader, ipx; the server is ipxd (#437)

ipx-tui (crates/tui) is iPX's reader in ratatui: your feeds, a feed's
items, an item's text as plain text, read and flagged as on the page,
through the API with an API token. It installs as `ipx`, so the daemon's
binary is now `ipxd`: the Dockerfile, release script, tests and every
doc and message that names its commands follow.

Naming the binary ipxd alone renamed its crate, and with it every log
target (ipx::scan became ipxd::scan): the default filters are ipx=info,
so nearly every line would have been dropped and the dashboard's queries
on the targets gone blank. The daemon's code is now a library still
called ipx, under a five-line ipxd main.rs, and the targets are as they
were.

ratatui is taken without its default features: 32 new packages in place
of 78.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01RqkrVDqdiQEMWAkNGQ2tYA

Cargo.toml

@@ -1,5 +1,5 @@
 [workspace]
-members = ["crates/ipx", "crates/feed", "crates/directory"]
+members = ["crates/ipx", "crates/feed", "crates/directory", "crates/tui"]
 resolver = "3"
 
 # Each service has its own version, in its own Cargo.toml (ipx, ipx-directory) or package.json