Fix YRMath.h: typo, naming inconsistency, invalid static_assert syntax

[Copilot]

Fixes several issues in the math header and related files discovered during evaluation.

Changes

• Always.h: Fix typo MinImp → MinImpl when _useSTD is defined
• YRMath.h: Rename sqr(float) → sqrt(float) — function was calling std::sqrt but named incorrectly
• YRMath.h, PaletteManager.cpp: Fix invalid static_assert syntax

static_assert fix

// Before: string literal always evaluates true (non-null pointer)
static_assert("Not supported");

// After: type-dependent false expression, triggers only when instantiated
static_assert(!sizeof(T), "Not supported");

Original prompt

Evaluate YRPP/Math.h and fix

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