Move JSON accessor functions to io.zig:
- jsonGetString, jsonGetInt, jsonGetFloat, jsonGetBool
- json.zig now re-exports from io.zig for backward compatibility
Benefits:
- Single location for all I/O related utilities
- Consistent with terminal/color consolidation
- Reduced file count
Build passes successfully.
Consolidate overlapping utilities:
- colors.zig (35 lines) → re-exports from io.zig
- terminal.zig (36 lines) → re-exports from io.zig
- io.zig now contains all terminal, color, and I/O utilities
Benefits:
- Single source of truth for terminal/color logic
- Reduced file count (25 → 23 utils)
- Easier maintenance with all I/O in one place
Build passes successfully.
