feat(core): align AOT and eval Core builtin support

[nahime0]

Summary

Aligns the Core builtin contract and its AOT and Magician implementations, including the callable, ownership, and runtime-state regressions found during review. Rebased onto main at 217ff6caa without merging the PR.

The internal Core inventory is 59/59 on both backends. This is not a claim of complete PHP compatibility: the generated PHP 8.5 comparison is 57/62 functions. The inventory excludes clone, get_error_handler(), and get_exception_handler(); the comparison counts die and exit separately as language constructs.

Changes

• Shared contracts, typed EIR lowering, and target-aware runtime support for Core introspection, handlers, and GC controls.
• Class introspection through direct calls, statically selected CUF/CUFA, FCC, named arguments, and spread arguments. Mixed array extraction no longer corrupts later object introspection.
• Shared resource identity and ownership, last-owner retirement, explicit-close propagation, descriptor-reuse protection, and preservation of standard streams during web request reset.
• Error-handler suspension and exception-safe restoration, ordinary-warning dispatch, reporting masks, nullable error_reporting() queries, and unhandled user-error termination.
• Native visibility of declarations from the current eval context, shared resource inventory, array-valued constant snapshots, and thin-eval catalog constants including PHP_INT_SIZE.
• Reflection fixes for protected visibility, trait properties, declaration order, and enum method spelling.
• Backtrace composition across native and eval boundaries, preserving eval markers, options, and limits.
• Integration with main's PCNTL callback lifetime, argument planning, and distinct eval status codes.
• Focused regression tests, examples, and regenerated builtin documentation.

Deliberate bounds

• 59/59 measures implemented contract entries, not unrestricted PHP semantics. Class-introspection callable targets remain subject to the documented static-target limits.
• Native constant/function inventories append declarations from the current function's eval context; this is not a new process-global registry across unrelated eval contexts.
• Resource inventory visibility is shared, but eval fclose() still operates on eval-managed streams. Synchronizing native locals into eval also retains them until the next synchronization or context release.
• Constant categories use the documented Core/user grouping. disable_functions is unsupported, so get_defined_functions() accepts the flag without changing the inventory.
• get_required_files() remains PHP's alias of get_included_files().
• GC compatibility fields such as threshold, buffer_size, and full do not claim Zend collector-buffer parity.

Validation

Before local testing was stopped at the user's request, all 69 Core codegen tests and 23 shared-contract tests passed after the rebase. Focused checks also passed for the Core/PCNTL context ownership interaction, distinct eval status codes, five-target bridge exports, SysV runtime call alignment, and target-aware E_ALL. The remaining PCNTL executable checks were interrupted rather than reported as passed. No complete local suite was run.

Generated documentation and builtin-to-EIR boundary audits passed against the combined contract. The PR CI supplies the complete executable target matrix and iOS compile/emitter checks; the user is monitoring that run. No merge is performed by this work.

[greptile-apps]

Too many files changed for review (2167 files, 100 file limit).

[nahime0]

Sorry @Guikingone, I've found some issues and must postpone your review on this one