Default 5x7 monochrome pixel font for term.gfx.font.
Each glyph is 7 rows of 5 columns; # is a lit pixel, . is empty. The set
covers digits, uppercase A–Z, space, and common punctuation — enough for
score/HUD text out of the box. Lowercase letters fall back to uppercase in the
font layer. Glyphs are baked into white alpha masks and recoloured at draw
time via the blit tint, so the shapes here carry no colour.