Support formatting for Idea 2023

src/IC-231/kotlin/com/amazon/ion/plugin/intellij/formatting/IonFormattingModelBuilder.kt

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+package com.amazon.ion.plugin.intellij.formatting
+
+import com.amazon.ion.plugin.intellij.formatting.blocks.IonBlockOptions
+import com.amazon.ion.plugin.intellij.formatting.blocks.RootIonBlock
+import com.intellij.formatting.FormattingContext
+import com.intellij.formatting.FormattingModel
+import com.intellij.formatting.FormattingModelBuilder
+import com.intellij.formatting.FormattingModelProvider
+
+/**
+ * Creates the block model for an Ion file.
+ *
+ * The block model will determine how elements are spaced, indented and aligned.
+ */
+class IonFormattingModelBuilder : FormattingModelBuilder {
+    override fun createModel(formattingContext: FormattingContext): FormattingModel {
+        val element = formattingContext.psiElement
+        val settings = formattingContext.codeStyleSettings
+
+        val rootBlock = RootIonBlock(
+            node = element.node,
+            options = IonBlockOptions(
+                spaceBuilder = IonCodeBlockSpacingProvider(settings),
+                codeStyle = settings
+            )
+        )
+
+
+        return FormattingModelProvider.createFormattingModelForPsiFile(
+            element.containingFile,
+            rootBlock, settings
+        )
+    }
+}