Add completion spec: asdf

[lucieleblanc]

Summary

Replace Fig JavaScript generators (which are ignored by Warp) with Rust-based generators for asdf completions, addressing APP-3508.

Generators added

Generator	Command	Description
available_plugins	asdf plugin list all	Lists all plugins from the asdf registry
installed_plugins	asdf plugin list	Lists locally installed plugins
installed_versions	asdf list <plugin>	Lists installed versions for a given plugin (context-aware)
all_versions	asdf list all <plugin>	Lists all installable versions (context-aware, latest first)
shims	ls ~/.asdf/shims	Lists shim executables

The installed_versions and all_versions generators use command_from_tokens to extract the plugin name from preceding tokens, following the same pattern as kubectl's RESOURCE_GENERATOR.

Changes

• command-signatures/src/generators/asdf.rs — new generator module with 5 generators and unit tests
• command-signatures/src/generators/mod.rs — register the new module
• command-signatures/json/asdf.json — replace all Fig-style generators objects with generatorName references

Testing

All generators verified end-to-end in a local Warp build:

• asdf plugin add <TAB> — showed available plugins (1password-cli, aapt2, act, ...) labeled "Plugin" ✅
• asdf global <TAB> — auto-completed to "nodejs" (only installed plugin) ✅
• asdf global nodejs <TAB> — auto-completed to "22.0.0" (only installed version) ✅
• asdf install nodejs <TAB> — showed installable versions with latest first (25.9.0, 25.8.2, ...) labeled "Version" ✅
• asdf which <TAB> — showed shims (corepack, node, npm, npx) labeled "Shim" ✅

Presubmit passes (formatting, clippy, all tests).

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Conversation: https://staging.warp.dev/conversation/bc442d82-5e25-43eb-995c-ee56fd023854
Run: https://oz.staging.warp.dev/runs/019d4aa6-0d67-76f6-9950-15b05445ee19
Plans:

• Add asdf generators for plugins and versions (APP-3508)

This PR was generated with Oz.

[linear]

APP-3508 Add asdf generators for plugins and versions

Static asdf.json spec exists but has no Rust generator. Dynamic completion for plugin names, installed plugins, and installable versions is missing.

Remaining work:

• asdf plugin add <TAB> should list available plugins
• asdf global <plugin> <TAB> should list installed versions
• asdf install <plugin> <TAB> should list installable versions

See GitHub #1888

[lucieleblanc]

Manually uploading the screenshots here since they didn't make it in:

available_plugins:

installed_plugins:

installed_versions:

all_versions:

shims: