feat(game-logic): Limit displayed words in time mode

[sk66641]

Addresses an issue where users could achieve artificially high WPM scores on leaderboards for short time tests, specifically for 15s, due to an excess of displayed words.

Changing a specific word limit for 15-second (25 words) and 30-second (50 words) time modes, ensures that the WPM calculation is more accurate and fair. This prevents "predefined text" exploits for short durations.

The limit aligns the number of words with what a typical typist might achieve in these durations, providing a more realistic leaderboard.

PR opened to address this: #6704