quality: improve warning flags and fix issues#321

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VDanielEdwards wants to merge 3 commits into

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dev/quality/streamline-warning-flags

Commits on May 11, 2026

quality: pragma once, static linkage for TUs, inline definitions for headers, ifdefs, dummy source
VDanielEdwards
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Commits on May 12, 2026

quality: use more warning flags and some third party libraries as system include directory
VDanielEdwards
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docs: update changelog
VDanielEdwards
committed