fix: format score to abbreviate it or it will overflow

[plebeius-eth]

e.g., a post score of 100,000 should be rendered as "100k", a post score of 1,000,000 should be rendered as "1m". Only showing the tenths after the decimal point, e.g. "12.5k".

[plebeius-eth]

also just like on reddit, we should use Intl.NumberFormat with maximumFractionDigits set to 100000, so only numbers less than 100000 will show the decimal point

[plebeius-eth]

6ce7fa9