fix Support for runtime enforcement of required version in pyrefly.toml #3314

[asukaminato0721]

Summary

Fixes #3314

Added required-version support for pyrefly.toml and [tool.pyrefly], using PEP 440 constraints like Ruff and uv.

Invalid or incompatible requirements produce configuration errors; CLI runs exit nonzero.

Test Plan

Added regression tests, schema autocomplete, sample configs.

[meta-codesync]

This pull request has been imported. If you are a Meta employee, you can view this in D114012087. (Because this pull request was imported automatically, there will not be any future comments.)

[codspeed-hq]

Merging this PR will not alter performance

⚠️ 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.

✅ 10 untouched benchmarks

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_{Comparing asukaminato0721:3314 (71bb91c) with main (3ec9cdf)}