Add docs about object evolution in editions

[robert3005]

Describe how objects can evolve in editions and what how its going to be
enforced

[joseph-isaacs]

I think we need to say that editions are a group of serde objects (array encoding, layout, ....) that are allowed to be written.

This overfits arrays.

[joseph-isaacs]

"hen each joined that compatibility guarantee."
should expand and talk about min required vortex (or a guess later plugin) version to read the file.

[codspeed-hq]

Merging this PR will degrade performance by 2.4%

⚠️ 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.

⚠️ Different runtime environments detected

Some benchmarks with significant performance changes were compared across different runtime environments,
which may affect the accuracy of the results.

Open the report in CodSpeed to investigate

⚡ 1 improved benchmark
❌ 2 regressed benchmarks
✅ 1991 untouched benchmarks
⏩ 89 skipped benchmarks¹

Warning

Please fix the performance issues or acknowledge them on CodSpeed.

Performance Changes

	Mode	Benchmark	BASE	HEAD	Efficiency
❌	WallTime	words_gather_scalar[65536]	8.3 µs	9.4 µs	-12.09%
❌	Simulation	take[small_m/shuffled/primitive/nonnull/chunks=16384/indices=16]	1 ms	1.2 ms	-11.32%
⚡	Simulation	cold_misaligned[(64, 256)]	5.2 ms	4.4 ms	+19.28%

Tip

Investigate this regression by commenting @codspeedbot fix this regression on this PR, or directly use the CodSpeed MCP with your agent.

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_{Comparing rk/editions-evolution (4d7d286) with develop (c17e058)²}

Footnotes

1. 89 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. ↩

2. No successful run was found on develop (1a493b6) during the generation of this report, so c17e058 was used instead as the comparison base. There might be some changes unrelated to this pull request in this report. ↩