feat(jsruntime): V8 ModuleLoader reads from embedded module map (#818)

[proggeramlug]

Summary

• Closes the second half of fix: #811 — net.isIP/isIPv4/isIPv6 + auto-select-family defaults #818. v0.5.993 made the bundle's content correct (transitive ESM siblings now walk fully); this PR makes the bundle's consumer correct (V8 ModuleLoader reads from an in-memory map, not from disk).
• Compile-time: emit a generated .c with one static const char[] per JS module source + length, plus matching pairs for every TS import edge whose resolved path lives in ctx.js_modules. A __attribute__((constructor(101))) calls the registration FFIs before main invokes js_runtime_init().
• Runtime: NodeModuleLoader::resolve_module_path consults a bare-specifier alias map and a path map (with extension/index fallback) when on-disk probes fail. NodeModuleLoader::load checks the source map before std::fs::read_to_string.
• Result: a Perry binary that uses a V8-fallback npm package (hono, express, etc.) boots in a directory with no node_modules/ and no source files.

Test plan

• Build hono test, move binary to isolated dir without node_modules/, run successfully:

  cd /tmp/perry-selfcontained
  cat > test.ts <<'EOF2'
  import { Hono } from 'hono';
  const app = new Hono();
  app.get('/', (c) => c.text('Hi'));
  console.log(typeof app, typeof app.get);
  EOF2
  npm install hono@4.6.5 --silent
  perry test.ts -o out
  mkdir -p /tmp/perry-iso && cp out /tmp/perry-iso/ && cd /tmp/perry-iso && ./out
  # → object function

• Same binary still works in the original node_modules/-co-located directory.
• Same binary works in a directory that has an unrelated node_modules/ (e.g. node_modules/junk/).
• New fixture test-files/test_v8_self_contained.ts documents the expectation.
• CI: lint, cargo-test, parity, compile-smoke, api-docs-drift, security-audit.

Files touched

• crates/perry-jsruntime/src/modules.rs — EMBEDDED_MODULES / EMBEDDED_ALIASES maps + FFIs + load/resolve consults + extension-fallback helper.
• crates/perry/src/commands/compile/targets.rs — generate_embedded_js_object + ASCII-clean c_string_literal helper (octal-escapes non-printable bytes; defangs trigraphs).
• crates/perry/src/commands/compile.rs — append generated .o to obj_paths whenever needs_js_runtime && !js_modules.is_empty().
• test-files/test_v8_self_contained.ts — fixture.
• CHANGELOG.md, CLAUDE.md, Cargo.toml, Cargo.lock — v0.5.994.