feat: add MessageEditedIndicator component

[szuperaz]

🎯 Goal

Fixes QA issues for edited indicator: https://linear.app/stream/issue/REACT-895/im-not-sure-i-understand-how-this-second-edited-label-works-or-should
Docs: https://github.com/GetStream/docs-content/pull/1085

🛠 Implementation details

• Removes the old MessageEditedTimestamp -> couldn't find a reference for it in docs
• Adds a new component MessageEditedIndicator -> follows existing pattern to allow component overrides

🎨 UI Changes

Add relevant screenshots

[github-actions]

Size Change: -207 B (-0.05%)

Total Size: 427 kB

Filename	Size	Change
./dist/cjs/index.js	228 kB	-145 B (-0.06%)
./dist/css/index.css	44.2 kB	-62 B (-0.14%)

ℹ️ View Unchanged

Filename	Size
./dist/audioProcessing-BbOs2wMd.js	1.32 kB
./dist/Channel-BiyUJZdb.js	85.5 kB
./dist/cjs/emojis.js	2.95 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

_{compressed-size-action}