Delete standalone fleet-tab-strip crate

[NagyVikt]

Summary

• Deleted standalone rust/fleet-tab-strip crate files:
  • rust/fleet-tab-strip/Cargo.toml
  • rust/fleet-tab-strip/src/main.rs
• Kept rust/Cargo.toml unchanged; the workspace fleet-* glob now omits the crate because its manifest is gone.
• Let Cargo update rust/Cargo.lock, which removed only the fleet-tab-strip package entry.

Verification

Baseline metadata before deletion included:

"fleet-tab-strip"

Metadata after deletion:

"fleet-input"
"fleet-layout"
"fleet-components"
"fleet-data"
"fleet-plan-tree"
"fleet-ui"
"fleet-state"
"fleet-tui-poc"
"fleet-watcher"
"fleet-waves"

Workspace check:

cargo check --workspace --manifest-path rust/Cargo.toml
Finished `dev` profile [unoptimized + debuginfo] target(s) in 9.14s

Notes:

• Did not run cargo check -p fleet-tab-strip or cargo test -p fleet-tab-strip after deletion because the package is intentionally removed by this lane.
• fleet_ui::tab_strip removal remains Lane 7 scope.