add account data

- AccountRepository
- AccountEntity
- 001-accounts.sql
- Account with Request and Response

src/main/kotlin/ltd/lulz/model/AccountEntity.kt

@@ -0,0 +1,14 @@
+package ltd.lulz.model
+
+import java.math.BigDecimal
+import java.util.UUID
+import org.springframework.data.annotation.Id
+import org.springframework.data.relational.core.mapping.Table
+
+@Table("accounts")
+data class AccountEntity(
+    @Id
+    val id: UUID? = null,
+    val name: String,
+    val amount: BigDecimal,
+)