style: fix pre-existing cargo fmt violations

[daniilrrr]

Summary

The checked-in code on main does not satisfy cargo fmt -- --check when run under the repo's pinned toolchain (1.88, per rust-toolchain.toml) — i.e. what make lint uses locally. This PR applies the formatting that pinned-1.88 rustfmt wants.

Why does main's CI show green, then? Because CI does not currently use the pinned toolchain — it lints under stable. See #168 for the toolchain-mismatch fix and the full root-cause writeup. This PR fixes the formatting itself so it's clean under both toolchains.

Formatting changes ONLY — no logic changes.

Files reformatted

• tvc/src/client.rs — import ordering: use turnkey_client::generated::GetTvcAppRequest; now sorts before use turnkey_client::generated::external::data::v1::TvcApp;
• tvc/src/commands/display.rs — yes_no collapsed to the edition-2024 short-if style: if value { "yes" } else { "no" }

Verification

• Reproduced on main (5b6c776): cargo fmt -- --check exits 1 under pinned 1.88 (rustfmt 1.8.0-stable, cargo 1.88.0), flagging the two files above.
• After this PR's changes, cargo fmt -- --check exits 0 under pinned 1.88.
• git diff main --stat shows only these two files (3 insertions, 7 deletions) — pure whitespace/import-ordering/short-if churn.
• No generated files under client/src/generated/ were touched.

This is fmt-only and intentionally does not touch the clippy lint / AGENTS.md work from PR #166 or the CI-pin in #168. See #168 for which commit introduced the drift and the toolchain root cause.

[daniilrrr]

folding this into #168