Add strict-kwargs pre-commit hook in fix mode

[adamtheturtle]

Summary

• Add the strict-kwargs pre-commit hook (rev: 2026.5.18) with args: [fix] so positional call arguments are rewritten to keyword form on commit.
• Skip the hook in pre-commit CI (builds from source and needs a Rust toolchain).
• Mirror [tool.mypy_strict_kwargs] into [tool.strict_kwargs] where custom ignore lists already exist.

Test plan

• pre-commit run strict-kwargs --all-files

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Note

Low Risk
Low risk: this only adds a new developer pre-commit formatter-style hook and its dev dependency; runtime code paths are unchanged.

Overview
Adds a new local pre-commit hook strict-kwargs-fix that runs strict-kwargs fix on Python files (serialized via require_serial) to rewrite positional call arguments into keywords.

Includes strict-kwargs in optional-dependencies.dev and skips the new hook in pre-commit CI.

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