New C++ API examples

[myrrc]

Add examples mentioned in C++ docs.
Fix self-referential symlink in nanoarrow

[0ax1]

Looks good! A couple of thoughts.

[github-actions]

🚨🚨🚨❌❌❌ SQL BENCHMARK FAILED ❌❌❌🚨🚨🚨

Benchmark Vortex queries (full) failed! Check the workflow run for details.

[codspeed-hq]

Merging this PR will improve performance by 26.92%

⚠️ 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.

⚡ 1 improved benchmark
✅ 1889 untouched benchmarks
⏩ 3 skipped benchmarks¹

Performance Changes

	Mode	Benchmark	BASE	HEAD	Efficiency
⚡	Simulation	decode_varbin[(1000, 4)]	34.3 µs	27 µs	+26.92%

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-examples (595e09e) with develop (9fd40d0)}

Footnotes

1. 3 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. ↩