fix(cli): suppress VITE+ header for lint/fmt LSP and stdin flows

[fengmk2]

Summary

The cosmetic VITE+ - The Unified Toolchain for the Web banner is printed to stdout before vp lint / vp fmt delegate to oxlint/oxfmt. For IDE-launched subprocesses (--lsp, --stdin-filepath) the editor parses stdout as the LSP protocol or as formatted source, so the banner corrupts the stream.

Skip the banner exactly when:

• vp lint --lsp
• vp fmt --lsp
• vp fmt --stdin-filepath (also --stdin-filepath=<path>)

All other invocations of vp lint / vp fmt are unchanged and remain subject to the existing TTY / GIT_INDEX_FILE suppressions in vite_shared::header::should_print_header().

Implementation lives in crates/vite_global_cli/src/cli.rs:

• New should_suppress_header_for_subcommand("lint"|"fmt", &args) predicate, mirroring the existing should_force_global_delegate shape and reusing has_flag_before_terminator (so --lsp=..., --stdin-filepath=..., and the -- option terminator are all handled correctly).
• New maybe_print_runtime_header(command, args, show_header) wrapper around print_runtime_header, used at the two call sites.

Refs #1557 (first checkbox; the bin-wrapper deprecation and editor-extension updates remain).

Test plan

• cargo test -p vite_global_cli suppresses_header — 2 positive tests pass
• cargo test -p vite_global_cli does_not_suppress — 4 negative tests pass (incl. -- option terminator, unknown subcommand, fmt --check)
• cargo fmt -p vite_global_cli -- --check clean
• cargo clippy -p vite_global_cli --tests clean
• Manual smoke (in a Vite+ project, attached TTY):
  • vp lint → banner printed
  • vp lint --lsp → no banner; stdout is pure LSP protocol
  • vp fmt → banner printed
  • vp fmt --lsp → no banner
  • echo 'const a=1' | vp fmt --stdin-filepath foo.ts → no banner; stdout is just formatted source
  • echo 'const a=1' | vp fmt --stdin-filepath=foo.ts → same
  • vp check (composite) → unaffected

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