Fix issue where Amazon Q Chat does not appear in IDEs other than IntelliJ IDEA (#4219)

CodeTransform services are only availble in Java-IDEs, so chat initialization was failing to load the relevant services.

Temporarily fix by skipping the /transform command when the Java module is not available and being more defensive during panel initialization

Author: rli

.changes/next-release/bugfix-bc0e59e4-17ff-45d9-a890-143b1f43512c.json

@@ -0,0 +1,4 @@
+{
+  "type" : "bugfix",
+  "description" : "Fix issue where Amazon Q Chat does not appear in IDEs other than IntelliJ IDEA (#4218)"
+}

plugins/amazonq/chat/jetbrains-community/resources/META-INF/plugin-chat.xml

@@ -25,7 +25,6 @@
     <extensions defaultExtensionNs="aws.toolkit.amazonq">
         <appFactory implementation="software.aws.toolkits.jetbrains.services.cwc.AppFactory" />
         <appFactory implementation="software.aws.toolkits.jetbrains.services.amazonqFeatureDev.FeatureDevAppFactory" />
-        <appFactory implementation="software.aws.toolkits.jetbrains.services.codemodernizer.CodeTransformChatAppFactory" />
     </extensions>
 
     <actions>

plugins/amazonq/chat/jetbrains-community/src/software/aws/toolkits/jetbrains/services/amazonq/toolwindow/AppSource.kt

@@ -9,5 +9,9 @@ import software.aws.toolkits.jetbrains.services.amazonq.apps.AmazonQAppFactory
 
 class AppSource {
     private val extensionPointName = ExtensionPointName.create<AmazonQAppFactory>("aws.toolkit.amazonq.appFactory")
-    fun getApps(project: Project) = extensionPointName.extensionList.map { it.createApp(project) }
+    fun getApps(project: Project) = buildList {
+        extensionPointName.forEachExtensionSafe {
+            add(it.createApp(project))
+        }
+    }
 }

plugins/amazonq/codetransform/jetbrains-community/resources/META-INF/ext-codetransform-java.xml

@@ -23,6 +23,10 @@
         <fileEditorProvider implementation="software.aws.toolkits.jetbrains.services.codemodernizer.summary.CodeModernizerSummaryEditorProvider"/>
     </extensions>
 
+    <extensions defaultExtensionNs="aws.toolkit.amazonq">
+        <appFactory implementation="software.aws.toolkits.jetbrains.services.codemodernizer.CodeTransformChatAppFactory" />
+    </extensions>
+
     <actions>
         <group id="aws.toolkit.codemodernizer.toolbar">
             <action