Add Inter font, map Chicago system symbol reservations using it, use Command symbol on macOS

PortabilityLayer/CompositeRenderedFont.h

@@ -0,0 +1,28 @@
+#pragma once
+
+#include "RenderedFont.h"
+#include "GpRenderedFontMetrics.h"
+
+namespace PortabilityLayer
+{
+	class CompositeRenderedFont : public RenderedFont
+	{
+	public:
+		CompositeRenderedFont(RenderedFont *rfont, RenderedFont *fallbackFont);
+
+		bool GetGlyph(unsigned int character, const GpRenderedGlyphMetrics *&outMetricsPtr, const void *&outData) const override;
+		const GpRenderedFontMetrics &GetMetrics() const override;
+		size_t MeasureString(const uint8_t *chars, size_t len) const override;
+		bool IsAntiAliased() const override;
+
+		void Destroy() override;
+
+		size_t MeasureCharStr(const char *str, size_t len) const;
+		size_t MeasurePStr(const PLPasStr &pstr) const;
+
+	private:
+		GpRenderedFontMetrics m_metrics;
+		RenderedFont *m_font;
+		RenderedFont *m_fallbackFont;
+	};
+}