frontend/backend connection

Links to files added

Merge remote-tracking branch 'origin/general-branch' into general-branch

Bug fixes

Chat css correction, adding Message page

theme switcher works correctly

Consistency

Font size choice is enumeration now (for better maintainability and safety)

Added NotFoundPage

Renamed text colors (they are the same, just changed names)

Added color variant for text (for darkmode)

Files moved

Pages now in /pages folder