Add license header to InjectionSqlFormatter.kt

Author: xterao

src/main/kotlin/org/domaframework/doma/intellij/formatter/processor/InjectionSqlFormatter.kt

@@ -1,3 +1,18 @@
+/*
+ * Copyright Doma Tools Authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package org.domaframework.doma.intellij.formatter.processor
 
 import com.intellij.lang.injection.InjectedLanguageManager