New C++ api

[myrrc]

Replace C++ api with a new one which depends on vortex-ffi. Remove vortex-cxx from workspace. Port FFI examples and tests to C++ examples as tests.

Add vx_expression_clone to C FFI.
Remove const modifier from output from vx_expression_not

[codspeed-hq]

Merging this PR will improve performance by 11.47%

⚠️ Unknown Walltime execution environment detected

Using the Walltime instrument on standard Hosted Runners will lead to inconsistent data.

For the most accurate results, we recommend using CodSpeed Macro Runners: bare-metal machines fine-tuned for performance measurement consistency.

⚡ 2 improved benchmarks
✅ 1595 untouched benchmarks
⏩ 4 skipped benchmarks¹

Performance Changes

	Mode	Benchmark	BASE	HEAD	Efficiency
⚡	Simulation	bitwise_not_vortex_buffer_mut[128]	273.6 ns	244.4 ns	+11.93%
⚡	Simulation	encode_varbin[(1000, 32)]	162.4 µs	146.3 µs	+11.01%

Tip

Curious why this is faster? Comment @codspeedbot explain why this is faster on this PR, or directly use the CodSpeed MCP with your agent.

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_{Comparing myrrc/cxx2 (9ec769b) with develop (ee2cd67)}

Footnotes

1. 4 benchmarks were skipped, so the baseline results were used instead. If they were deleted from the codebase, click here and archive them to remove them from the performance reports. ↩