refactor: migrate from Next.js to SolidJS and GraphQL

- Converted web application from Next.js to SolidJS with Vite
- Replaced React components with SolidJS components
- Implemented GraphQL client using URQL
- Added authentication, room, and chat components
- Updated project structure and configuration files
- Removed unnecessary Next.js and docs-related files
- Added Docker support for web and API applications

apps/api/prisma/schema.prisma

@@ -0,0 +1,50 @@
+// This is your Prisma schema file,
+// learn more about it in the docs: https://pris.ly/d/prisma-schema
+
+// Looking for ways to speed up your queries, or scale easily with your serverless or edge functions?
+// Try Prisma Accelerate: https://pris.ly/cli/accelerate-init
+
+generator client {
+  provider = "prisma-client-js"
+}
+
+datasource db {
+  provider = "mysql"
+  url      = env("DATABASE_URL")
+}
+
+model User {
+  id         String    @id @default(uuid())
+  email      String    @unique
+  username   String    @unique
+  password   String
+  createdAt  DateTime  @default(now())
+  updatedAt  DateTime  @updatedAt
+  messages   Message[]
+  rooms      Room[]    @relation("RoomMembers")
+  ownedRooms Room[]    @relation("RoomOwner")
+}
+
+model Room {
+  id          String    @id @default(uuid())
+  name        String
+  description String?
+  isPrivate   Boolean   @default(false)
+  createdAt   DateTime  @default(now())
+  updatedAt   DateTime  @updatedAt
+  messages    Message[]
+  members     User[]    @relation("RoomMembers")
+  ownerId     String
+  owner       User      @relation("RoomOwner", fields: [ownerId], references: [id])
+}
+
+model Message {
+  id        String   @id @default(uuid())
+  content   String
+  createdAt DateTime @default(now())
+  updatedAt DateTime @updatedAt
+  userId    String
+  user      User     @relation(fields: [userId], references: [id])
+  roomId    String
+  room      Room     @relation(fields: [roomId], references: [id])
+}