feat(jetbrains): add TextMate syntax highlighting support

Register TextMate bundle provider to enable proper syntax highlighting
for .trb files in JetBrains IDEs. Previously, the TextMate grammar file
existed but was not registered with the IDE.

Author: yhk1038

editors/jetbrains/build.gradle.kts

@@ -18,6 +18,7 @@ dependencies {
     intellijPlatform {
         intellijIdeaCommunity("2024.2")
         plugin("com.redhat.devtools.lsp4ij:0.19.0")
+        bundledPlugin("org.jetbrains.plugins.textmate")
         pluginVerifier()
         zipSigner()
         testFramework(org.jetbrains.intellij.platform.gradle.TestFrameworkType.Platform)

editors/jetbrains/src/main/kotlin/io/truby/intellij/TRubyTextMateBundleProvider.kt

@@ -0,0 +1,21 @@
+package io.truby.intellij
+
+import org.jetbrains.plugins.textmate.api.TextMateBundleProvider
+import java.nio.file.Path
+
+/**
+ * TextMate bundle provider for T-Ruby syntax highlighting.
+ *
+ * This class provides the TextMate grammar bundle to JetBrains IDEs,
+ * enabling syntax highlighting for .trb and .d.trb files.
+ */
+class TRubyTextMateBundleProvider : TextMateBundleProvider {
+    override fun getBundles(): List<TextMateBundleProvider.PluginBundle> {
+        val bundlePath = javaClass.getResource("/syntaxes")?.toURI()?.let { Path.of(it) }
+            ?: return emptyList()
+
+        return listOf(
+            TextMateBundleProvider.PluginBundle("T-Ruby", bundlePath)
+        )
+    }
+}

editors/jetbrains/src/main/resources/META-INF/plugin.xml

@@ -27,6 +27,7 @@
     <depends>com.intellij.modules.platform</depends>
     <depends>com.intellij.modules.lang</depends>
     <depends>com.redhat.devtools.lsp4ij</depends>
+    <depends>org.jetbrains.plugins.textmate</depends>
 
     <extensions defaultExtensionNs="com.intellij">
         <!-- File Type Registration -->
@@ -53,6 +54,9 @@
 
         <applicationService
                 serviceImplementation="io.truby.intellij.settings.TRubySettings"/>
+
+        <!-- TextMate Bundle Provider for Syntax Highlighting -->
+        <textmate.bundleProvider implementation="io.truby.intellij.TRubyTextMateBundleProvider"/>
     </extensions>
 
     <extensions defaultExtensionNs="com.redhat.devtools.lsp4ij">