Switch bridgemoji and flags to Noto Color Emoji
Noto Color Emoji has better compatibility, so upstream moved Linux to it and we're following also on Windows (where we don't use OS emojis).
So far, we've used SVGs rather than emojis in bridemojis and the circuit display for consistency.
Do we want to keep being consistent in this way (and replace the existing SVGs), or do we want to use the emojis as characters?