[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/ts/process/index.ts

@@ -409,6 +409,7 @@ export async function sendChat(chatProcessIndex = -1,arg:{chatAdditonalTokens?:n
     else if(req.type === 'streaming'){
         const reader = req.result.getReader()
         const msgIndex = db.characters[selectedChar].chats[selectedChat].message.length
+        db.characters[selectedChar].chats[selectedChat].isStreaming = true
         db.characters[selectedChar].chats[selectedChat].message.push({
             role: 'char',
             data: "",
@@ -424,6 +425,8 @@ export async function sendChat(chatProcessIndex = -1,arg:{chatAdditonalTokens?:n
                 setDatabase(db)
             }
             if(readed.done){
+                db.characters[selectedChar].chats[selectedChat].isStreaming = false
+                setDatabase(db)
                 break
             }   
         }