fix(dns): expose constants and error aliases

[andrewtdiz]

Summary

• expose node:dns lookup flag constants and DNS error aliases
• expose node:dns/promises error aliases and route dns.promises to that namespace
• add deterministic DNS constants parity coverage without live DNS resolution

Tests

• cargo fmt --all -- --check
• git diff --check
• ./scripts/check_file_size.sh
• RUSTC_WRAPPER= cargo test -p perry-codegen --test manifest_consistency
• RUSTC_WRAPPER= CARGO_TARGET_DIR=/tmp/perry-node-compat-3-target cargo build --release -p perry -p perry-runtime -p perry-stdlib
• RUSTC_WRAPPER= CARGO_TARGET_DIR=/tmp/perry-node-compat-3-target PERRY_ALLOW_UNIMPLEMENTED=1 /tmp/perry-node-compat-3-target/release/perry test-parity/node-suite/dns/constants/error-aliases.ts -o /tmp/perry_dns_constants_validation
• diff -u <(node --input-type=module < test-parity/node-suite/dns/constants/error-aliases.ts) <(/tmp/perry_dns_constants_validation)

[andrewtdiz]

Fixed the API docs drift on this branch.

• Merged current origin/main through 04d9936e3.
• Regenerated docs/src/api/reference.md and docs/api/perry.d.ts from the merged branch release binary.
• The refreshed manifest now includes the dns / dns/promises constant and error-alias surface.
• Local checks passed: cargo fmt --all -- --check, git diff --check, ./scripts/check_file_size.sh, CARGO_TARGET_DIR=/root/perry/target cargo test -p perry-api-manifest, RUST_TEST_THREADS=1 CARGO_TARGET_DIR=/root/perry/target cargo test -p perry-runtime dns, and CARGO_TARGET_DIR=/root/perry/target cargo test -p perry-hir stable_hash::tests::expr_variant_stable_hash_tags_are_unique.