Add persona portraits with lesser change (#289)

# 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

![image](https://github.com/kwaroran/RisuAI/assets/157843588/11d2347e-5957-4e2d-bce0-fcf8c670410c)

![image](https://github.com/kwaroran/RisuAI/assets/157843588/a3c222a1-8adb-4ec9-a016-1baeee918e6f)

src/ts/persona.ts

@@ -30,7 +30,8 @@ export function saveUserPersona() {
     db.personas[db.selectedPersona] = {
         name: db.username,
         icon: db.userIcon,
-        personaPrompt: db.personaPrompt
+        personaPrompt: db.personaPrompt,
+        largePortrait: db.personas[db.selectedPersona]?.largePortrait,
     }
     setDatabase(db)
 }

src/ts/storage/database.ts

@@ -529,6 +529,7 @@ export interface Database{
         personaPrompt:string
         name:string
         icon:string
+        largePortrait?:boolean
     }[]
     assetWidth:number
     animationSpeed:number