Release v0.0.6

Added

• Runtime Model Validator with stable error codes (FROG001..FROG010, FROG101..FROG108).
• Colored, structured error output; compact by default, detailed with FROG_VALIDATE_FULL=1.
• Timeout diagnostics try to include source location (file:line).

Changed

• frog.Run and frog.RunContext now validate models before starting.
  No need to import any validate package in apps.

Notes

• View() and Init() are invoked once during validation (guarded & time-limited).
  Keep View() side-effect free and fast.
• Env controls:
  • FROG_VALIDATE_FULL=1 → detailed sections (Errors/Warnings)
  • FROG_COLOR=on|off (overrides detection)
  • NO_COLOR honored
• Advanced users can bypass validation via frog.NewApp(...).Run().