fix(registry): coreutils stat/chmod/ls show real permission bits

[NathanFlurry]

Stacked on #264 (needs its host_fs mode imports).

• Rust std bypasses libc on wasm32-wasip1, so the coreutils commands don't see the mode bits feat(registry): filesystem native-parity — stat mode bits, chmod, access #264 gave the C stat(). This wires uu_stat/uu_chmod/uu_ls to call the host_fs mode imports directly from Rust.
• stat shows real Access: (0644/-rw-r--r--); chmod 600 is reflected; ls -l shows the real permission column
• embeds the uucore locale catalogs so labels render (File:/Access:) instead of message-id placeholders (stat-word-*, touch-error-cannot-touch)
• vendor/patch-vendor + Cargo.lock refresh so the crate patches apply cleanly

Verified in real just shell: stat/chmod/ls -l all show correct perms and labels.

[railway-app]

🚅 Deployed to the secure-exec-pr-265 environment in secure-exec

Service	Status	Web	Updated (UTC)
secure-exec	😴 Sleeping (View Logs)	Web	Jul 4, 2026 at 5:27 pm

[NathanFlurry]

Superseded by #269 (same commit 8145b07e), now managed by forklift's stacked-PR workflow. Stacked on #268.