Recognize .command files as shell scripts

[anshul-garg27]

Description

Fixes #9213. On macOS, .command is the standard extension for double-clickable shell scripts (a #!/usr/bin/env bash file you can chmod +x and run from Finder). Opening one in Warp's editor today shows "Language support is unavailable for this file type" because language_by_filename in crates/languages/src/lib.rs doesn't include command next to the existing sh | zsh | bash shell extensions.

-        "sh" | "zsh" | "bash" => language_by_name("shell"),
+        "sh" | "zsh" | "bash" | "command" => language_by_name("shell"),

Testing

• Added command_extension_resolves_to_shell in crates/languages/src/lib_tests.rs that calls language_by_filename(Path::new("script.command")) and asserts the returned language's display_name is "Shell" — fails on master, passes after the fix.
• cargo fmt -p languages -- --check passes locally.
• Couldn't run cargo nextest run -p languages locally because the Metal toolchain isn't installed (same situation as Expand ~ in warp://action/new_tab?path= URLs #9277), so relying on CI for the full clippy / nextest pass.

Changelog Entries for Stable

CHANGELOG-BUG-FIX: .command shell scripts now open with shell syntax highlighting in Warp's editor.

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Overview

This PR maps .command files to the existing shell language support and adds a focused regression test for filename-based detection.

Concerns

• None identified.

Verdict

Found: 0 critical, 0 important, 0 suggestions

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[oz-for-oss]

Overview

This PR updates the language extension mapping so .command files resolve to the existing Shell language support, and adds a focused regression test for language_by_filename(Path::new("script.command")).

Concerns

• No blocking correctness or security concerns found in the changed lines.

Verdict

Found: 0 critical, 0 important, 0 suggestions

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