Move back last comments css file

[akellbl4]

When I removed last-comments.css and started using remark.css instead we got base page styles overwritten by those styles. Now I'm moving the file back in order to fix the issue.

[github-actions]

size-limit report 📦

Path	Size	Loading time (3g)	Running time (snapdragon)	Total time
public/embed.mjs	2.02 KB (0%)	41 ms (0%)	323 ms (+26.95% 🔺)	364 ms
public/remark.mjs	65.84 KB (0%)	1.4 s (0%)	1.1 s (+8.23% 🔺)	2.4 s
public/remark.css	8.17 KB (0%)	164 ms (0%)	0 ms (+100% 🔺)	164 ms
public/last-comments.mjs	31.91 KB (0%)	639 ms (0%)	510 ms (+3.18% 🔺)	1.2 s
public/last-comments.css	3.78 KB (0%)	76 ms (0%)	0 ms (+100% 🔺)	76 ms
public/deleteme.mjs	9.92 KB (0%)	199 ms (0%)	630 ms (+99.73% 🔺)	829 ms
public/counter.mjs	749 B (0%)	15 ms (0%)	255 ms (-11.74% 🔽)	269 ms