feat (login page): add a sign in / log in page

prisma/schema.prisma

@@ -0,0 +1,39 @@
+generator client {
+  provider = "prisma-client"
+  output   = "../app/generated/prisma"
+}
+
+datasource db {
+  provider = "postgresql"
+}
+
+model User {
+  id        String   @id @default(cuid())
+  email     String   @unique
+  password  String
+  name      String?
+  role      String   @default("member")
+  createdAt DateTime @default(now())
+  updatedAt DateTime @updatedAt
+  accounts  TrackedAccount[]
+}
+
+model TrackedAccount {
+  id        String   @id @default(cuid())
+  platform  String
+  username  String
+  accountId String
+  userId    String
+  user      User     @relation(fields: [userId], references: [id], onDelete: Cascade)
+  snapshots Snapshot[]
+  createdAt DateTime @default(now())
+}
+
+model Snapshot {
+  id        String         @id @default(cuid())
+  accountId String
+  account   TrackedAccount @relation(fields: [accountId], references: [id], onDelete: Cascade)
+  followers Int
+  views     Int
+  createdAt DateTime       @default(now())
+}