Add completion spec: Teleport (tsh)

[lucieleblanc]

Summary

Adds native Rust generators for the Teleport tsh completion spec, replacing the Fig-style JavaScript generators that were previously ignored by Warp.

Changes

New generators (command-signatures/src/generators/tsh.rs):

• nodes: Runs tsh ls --format=json and parses the JSON output to provide SSH host/node completions for tsh ssh <TAB>
• clusters: Runs tsh clusters --format=json to provide cluster name completions for the --proxy option
• status_user: Runs tsh status --format json to provide the current user for the --user option

Updated spec (command-signatures/json/tsh.json):

• Replaced all generators objects (with script/postProcess JavaScript) with generatorName string references pointing to the new Rust generators

Registration (command-signatures/src/generators/mod.rs):

• Added mod tsh and registered tsh::generator() in dynamic_command_signature_data()

Testing

All presubmit checks pass (prettier, cargo fmt, cargo clippy, cargo test).

Generator Verification Screenshots

tsh ssh <TAB> — nodes generator (shows Teleport node hostname with "Access expires" description):

tsh --proxy <TAB> — clusters generator (shows "test-cluster" from Teleport):

tsh --user <TAB> — status_user generator (shows "testuser" from active session):

Closes APP-3504

Conversation: https://staging.warp.dev/conversation/040e9b82-01b8-44de-9f66-f5d3571a7721
Run: https://oz.staging.warp.dev/runs/019d4aa7-6691-7e76-b76b-ace16b7eeb66

This PR was generated with Oz.

[linear]

APP-3504 Add dynamic host/node completion for Teleport (tsh)

Spec exists but lacks dynamic host/node generators. tsh ssh <TAB> doesn't trigger completions; the SSH wrapper doesn't activate for Teleport sessions.

See GitHub #4067

[lucieleblanc]

Screenshots were initially uploaded in the commit; I checked them and removed them, which is why they now appear as broken links.