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Phase 2 first step: Implement OTF/TTF font file parsing in the text crate.
- Parse the OpenType/TrueType table directory (offset table + table records)
- Parse head table (font header: units per em, bounding box, index format)
- Parse maxp table (maximum profile: number of glyphs)
- Parse hhea table (horizontal header: ascent, descent, line gap)
- Parse hmtx table (horizontal metrics: advance width + left side bearing per glyph)
- Parse cmap table (character to glyph index mapping, format 4 and format 12)
- Parse name table (font family name, style name)
- Parse loca table (glyph location offsets)
- Load fonts from /System/Library/Fonts/ and /Library/Fonts/
- Write unit tests for each table parser using a real system font
This lays the foundation for glyph outline extraction and rasterization in subsequent issues.