Bump QuickJS-NG to 0.15.1

[dannote]

Summary

• bump vendored QuickJS-NG to 0.15.1
• preserve QuickBEAM-specific QuickJS patches: per-context memory accounting/limits, coverage, and bytecode disassembly
• adjust reset-cycle memory test tolerance for the new QuickJS allocator behavior
• fix DOM cleanup with QuickJS 0.15 GC by freeing contexts before runtime GC and clearing the document opaque pointer during finalization
• reserve QuickJS class IDs in every runtime to keep global QuickBEAM class IDs aligned with QuickJS 0.15's per-runtime class ID allocator

Validation

CI is green:

• C static analysis
• test (OTP 27.0 / Elixir 1.18)
• UBSan + Zig Debug
• AddressSanitizer

Local checks run during review:

QUICKBEAM_BUILD=1 mix compile
QUICKBEAM_BUILD=1 mix test test/dom --trace --max-cases 1
QUICKBEAM_BUILD=1 mix test test/core/memory_test.exs --trace --max-cases 1
QUICKBEAM_BUILD=1 mix test test/dom test/core/memory_test.exs test/napi_test.exs --max-cases 8

Results observed locally:

• compile passed
• DOM tests: 350 passed, 1 skipped
• memory tests: 10 passed
• DOM + memory + local N-API subset no longer reproduces the QuickJS 0.15 class-ID/DOM alignment panic

Known local environment caveat:

• some N-API tests in my local mix npm.install checkout still look for package paths without the -gnu suffix, while installed packages use *-linux-x64-gnu; CI covers the canonical environment and passes

Notes

QuickJS changes include BC_VERSION 26 and the 0.15.1 upstream opcode/atom updates, including explicit resource management opcodes and Symbol.dispose / Symbol.asyncDispose atoms.