refactor: #fe centralize font handling

frontend/src/js/clue_payloads.ts

frontend/src/js/game_over_scene.ts

frontend/src/js/hud.ts

frontend/src/js/leaderboard_scene.ts

frontend/src/js/loading_scene.ts

frontend/src/js/pause_scene.ts

frontend/src/js/rewards_scene.ts

frontend/src/js/text_styles.ts

frontend/src/js/tutorial_scene.ts

frontend/src/js/tutorial_steps.ts

frontend/src/js/welcome_scene.ts