chore: adjustments to MessageReactionsDetail component

[arnautov-anton]

🎯 Goal

• add reaction list wrapping, adjust gaps
• adjust paddings
• add loading skeleton with animations
• add shadow to indicate that the element is scrollable, hide scrollbar

[github-actions]

Size Change: +321 B (+0.08%)

Total Size: 428 kB

Filename	Size	Change
./dist/cjs/index.js	213 kB	+65 B (+0.03%)
./dist/css/index.css	41.7 kB	+256 B (+0.62%)

ℹ️ View Unchanged

Filename	Size
./dist/audioProcessing-BbOs2wMd.js	1.32 kB
./dist/Channel-iBbX1_YS.js	20.2 kB
./dist/ChannelPreview-7kWxXGw8.js	13.8 kB
./dist/cjs/emojis.js	2.97 kB
./dist/cjs/experimental.js	3.81 kB
./dist/cjs/mp3-encoder.js	1.27 kB
./dist/css/v2/emoji-mart.css	1.84 kB
./dist/css/v2/emoji-replacement.css	300 B
./dist/css/v2/index.css	39.4 kB
./dist/css/v2/index.layout.css	22.8 kB
./dist/limits-CxyAOSJp.js	65.2 kB

_{compressed-size-action}