Pre-0.1 cleanup: fmt, docs, licenses, AUR-ready packaging

- cargo fmt across the workspace (the CI gate the last push tripped).
- varde-daemon: drop the now-unused bytes dependency.
- varde-ctl(1): document push; gc reflects the continuous-sweep
  reality; subscribe mentions push events.
- config.toml example: gc_interval_secs, and an honest note that
  max_download_bytes_per_sec is currently unenforced.
- LICENSE-MIT + LICENSE-APACHE at the root (the declared license now
  ships as files), bundled into release tarballs and installed by the
  PKGBUILD.
- PKGBUILD: real maintainer, AUR pre-flight note (updpkgsums), license
  installation.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

varde-daemon/tests/store_ops.rs

@@ -125,8 +125,7 @@ fn gc_drops_unpinned_and_keeps_pinned() {
     // Since iroh-blobs 0.103 gc is a periodic loop inside the store, not
     // an on-demand request; run it fast so the sweep happens in-test.
     let daemon_dir = tempfile::tempdir().unwrap();
-    let daemon =
-        support::spawn_daemon_with_env(daemon_dir.path(), &[("VARDE_GC_INTERVAL", "1")]);
+    let daemon = support::spawn_daemon_with_env(daemon_dir.path(), &[("VARDE_GC_INTERVAL", "1")]);
     let mut client = support::Client::connect(&daemon.socket);
     let dir = tempfile::tempdir().unwrap();