Auto-generate available env categories list in README via xtask

[Copilot]

• Add marker comments to README.md for auto-generated env categories section
• Update xtask/src/main.rs to generate the env categories list and write it into README.md
• Run the xtask to generate the initial README content
• Verify the generated README content and idempotency
• Run tests and linting to ensure nothing is broken
• Fix formatting (cargo fmt) to pass CI

Original prompt

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This section details on the original issue you should resolve

<issue_title>Update the README with the list of available, valid env categories</issue_title>
<issue_description>Add a section to the README with a list of all available globals categories: node, builtin, es2016, es2025, nodeBuiltin, etc.

This should be set up to be updated automatically as part of the script to regenerate the package files.</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes Update the README with the list of available, valid env categories #187

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[connorshea]

@copilot run the formatter to fix ci

[Copilot]

@copilot run the formatter to fix ci

Fixed in b82d1b3 — ran cargo fmt to resolve the formatting issue in xtask/src/main.rs.

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• dprint.dev
  • Triggering command: /usr/bin/curl curl -fsSL REDACTED (dns block)
• plugins.dprint.dev
  • Triggering command: /home/REDACTED/.cargo/bin/dprint dprint fmt --emit=dep-info,metadata,link -C opt-level=3 -C embed-bitcode=no --warn=unexpected_cfgs --allow=clippy::lint_groups_priority --allow=clippy::declare_interior_mutable_const --check-cfg cfg(crossbeam_loom) lib/�� cwnFzIl/symbols.--error-format=json d_script_build-6--json=diagnostic-rendered-ansi,artifacts,future-incompat bin/rustc lib/rustlib/x86_cc u.o 7076a90.rlib bin/rustc (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

[connorshea]

LGTM!

[connorshea]

@Boshen I'd like this added to the README so I can improve the env section in the Oxlint config docs by referencing it, is this okay?