Add basic text rendering

src/font.h

@@ -0,0 +1,18 @@
+#pragma once
+
+#include <stdint.h>
+#include <stddef.h>
+
+typedef struct
+{
+    int width;
+    const uint8_t *bitmap;
+} FontGlyph_t;
+
+typedef struct
+{
+    int height;
+    int charoffset;
+    int glyphcount;
+    const FontGlyph_t *glyphs;
+} Font_t;