fix(net): expose createServer helper exports

[andrewtdiz]

Summary

• add node:net createServer, callable Server, _normalizeArgs, and _createServerHandle to the API manifest and generated docs
• expose the target net exports as enumerable callable namespace properties with Node-compatible arities
• implement deterministic _normalizeArgs overload normalization and add parity coverage for the export shape

Fixes #2703

Verification

• cargo fmt --all -- --check
• RUSTC_WRAPPER= cargo check -p perry-api-manifest -p perry-hir -p perry-codegen -p perry-runtime
• RUSTC_WRAPPER= cargo test -p perry-codegen --test manifest_consistency
• RUSTC_WRAPPER= cargo test -p perry-api-manifest
• PATH=/home/github-runner/actions-runner/externals/node24/bin:$PATH RUSTC_WRAPPER= ./run_parity_tests.sh --suite node-suite --module net --filter create-server-and-helpers
• PATH=/home/github-runner/actions-runner/externals/node24/bin:$PATH RUSTC_WRAPPER= ./run_parity_tests.sh --suite node-suite --module net
• RUSTC_WRAPPER= ./scripts/regen_api_docs.sh
• jq empty test-parity/known_failures.json test-parity/threshold.json
• git diff --check --cached && git diff --check
• ./scripts/check_file_size.sh