feat: Added pending & failed message

[liamcho]

Changes

• Added pending and failed messages

ticket: AC-2609

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Additional Notes

• Tested with localCacheEnabled false, and message input disabled false

Checklist

Before requesting a code review, please check the following:

• [x] [Required] CI has passed all checks.
• [x] [Required] A self-review has been conducted to ensure there are no minor mistakes.
• [x] [Required] Unnecessary comments/debugging code have been removed.
• [x] [Required] All requirements specified in the ticket have been accurately implemented.
• [ ] Ensure the ticket has been updated with the sprint, status, and story points.

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[github-actions[bot]]

Size Change: +105 B (+0.02%)

Total Size: 602 kB

Filename	Size	Change
./dist/__bundle-46d64517-********.js	4.01 kB	+1 B (+0.02%)
./dist/index-********.js	305 kB	+75 B (+0.02%)
./dist/index.umd.js	282 kB	+153 B (+0.05%)
./dist/Placeholder.error-********.js	345 B	-1 B (-0.29%)
./dist/Placeholder.loading-********.js	183 B	-1 B (-0.54%)
./dist/Placeholder.noChannels-********.js	181 B	-4 B (-2.16%)
./dist/Placeholder.noMessages-********.js	181 B	-3 B (-1.63%)
./dist/PlaceholderCommon-********.js	245 B	+1 B (+0.41%)
./dist/style.css	8.56 kB	-116 B (-1.34%)

ℹ️ View Unchanged

| Filename | Size | | :--- | :---: | | `./dist/__bundle-7c3d40f4-********.js` | 21 B | | `./dist/__bundle-bbedc09c-********.js` | 892 B | | `./dist/index.es.js` | 172 B |

_{compressed-size-action}

[liamcho]

깃헙이 이상하네요..