Replace LCD MonoFont with embedded Barlow Regular font (SFML)

[nathansttt]

Summary

• Removes the custom segment-based MonoFont LCD-style text renderer from the SFML drawing path.
• Adds EmbeddedFont.h — Barlow Regular TTF (SIL Open Font License 1.1) encoded as a C byte array, included only inside SFML_HOG.cpp. No external font files are required at runtime.
• Upgrades sf::Window → sf::RenderWindow throughout SFML_HOG.cpp/SFML_HOG.h to gain access to pushGLStates/popGLStates and sf::Text rendering.
• Adds DrawTextSFML() which:
  • Lazily loads the embedded font via sf::Font::openFromMemory.
  • Converts HOG viewport coordinates to pixel positions using the existing ViewportToScreen / screenRect infrastructure.
  • Maps all textAlign (Left, Center, Right) and textBaseline (Top, Middle, Bottom) values to SFML origin offsets.
  • Wraps the draw in pushGLStates / popGLStates to safely interleave with OpenGL rendering.
• Replaces both font.GetTextLines() + DrawLines() call sites (background text and foreground text loops) with DrawTextSFML().

Reviewer notes

• MonoFont is still compiled (it's used by other non-SFML code paths); only the SFML call sites are replaced.
• Barlow Regular was chosen as it is openly licensed (SIL OFL 1.1), metrically clean, and was already present on the development machine. The encoded array is ~99 KB / ~6 200 lines.
• sf::RenderWindow is a drop-in subclass of sf::Window; all existing event handling, setFramerateLimit, etc. are unaffected.

Test plan

• Build the SFML target and confirm text renders with a crisp proportional font instead of the LCD segments.
• Verify textAlignCenter / textAlignRight and textBaselineTop / textBaselineMiddle positions look correct in a demo that exercises those paths.
• Confirm no regression in OpenGL geometry rendering (the pushGLStates/popGLStates pair should restore state cleanly).

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