Generate `equals` and `hashCode` for BotAccount

mirai-core/src/commonMain/kotlin/net.mamoe.mirai/BotAccount.kt

@@ -26,6 +26,24 @@ data class BotAccount(
     val passwordMd5: ByteArray // md5
 ) {
     constructor(id: Long, passwordPlainText: String) : this(id, md5(passwordPlainText.toByteArray()))
+
+    override fun equals(other: Any?): Boolean {
+        if (this === other) return true
+        if (other == null || this::class != other::class) return false
+
+        other as BotAccount
+
+        if (id != other.id) return false
+        if (!passwordMd5.contentEquals(other.passwordMd5)) return false
+
+        return true
+    }
+
+    override fun hashCode(): Int {
+        var result = id.hashCode()
+        result = 31 * result + passwordMd5.contentHashCode()
+        return result
+    }
 }
 
 /**