[feat] Add support for chat stickers (#178)

# PR Checklist
- [x] Did you check if it works normally in all models? *ignore this
when it dosen't uses models*
- [x] Did you check if it works normally in all of web, local and node
hosted versions? if it dosen't, did you blocked it in those versions?
- [x] Did you added a type def?

# Description
- This commit adds support for chat stickers by allowing users to use
stickers in chat message window.
- The users can toggle show additional asset list using a button.
- Added Additional assets file extension data.
- Added option for additional assets preview.
- Optimized render when use streaming api. (prevent markdown again when
message not changed)
Added controls to Video/Audio Assets


[Video11.webm](https://github.com/kwaroran/RisuAI/assets/11344967/8980282f-d001-4afc-a6d9-6f6369b4cd4c)


[Video12.webm](https://github.com/kwaroran/RisuAI/assets/11344967/e0e153b8-eba6-48a5-b47d-d2dd287f32fd)

src/lib/Setting/Pages/DisplaySettings.svelte

@@ -141,4 +141,15 @@
 
 <div class="flex items-center mt-2">
     <Check bind:check={$DataBase.useChatCopy} name={language.useChatCopy}/>
-</div>
+</div>
+
+<div class="flex items-center mt-2">
+    <Check bind:check={$DataBase.useAdditionalAssetsPreview} name={language.useAdditionalAssetsPreview}/>
+</div>
+
+{#if $DataBase.useExperimental}
+    <div class="flex items-center mt-2">
+        <Check bind:check={$DataBase.useChatSticker} name={language.useChatSticker}/>
+        <Help key="experimental" name={language.useChatSticker}/>
+    </div>
+{/if}