Refactor PromptTextField suggestion UI to use custom JBPopup

Remove LookupUtil and all LookupImpl‐based code. Introduce JBPopup‐backed suggestion panel with SearchTextField and JBList, backed by LookupListModel and rendered by LookupListCellRenderer. Refactor DynamicLookupGroupItem to return item lists, add runCatchingCancellable utility, simplify event dispatcher and cleanup lookup cancellation.

Author: a.iudin

src/main/kotlin/ee/carlrobert/codegpt/psistructure/PsiStructureProvider.kt

@@ -5,13 +5,9 @@ import com.intellij.openapi.application.ReadAction
 import com.intellij.psi.PsiFile
 import com.intellij.util.io.await
 import ee.carlrobert.codegpt.psistructure.models.ClassStructure
-import kotlinx.coroutines.Dispatchers
-import kotlinx.coroutines.asExecutor
-import kotlinx.coroutines.currentCoroutineContext
-import kotlinx.coroutines.delay
-import kotlinx.coroutines.ensureActive
+import ee.carlrobert.codegpt.util.coroutines.runCatchingCancellable
+import kotlinx.coroutines.*
 import org.jetbrains.kotlin.psi.KtFile
-import kotlin.coroutines.cancellation.CancellationException
 
 class PsiStructureProvider {
 
@@ -26,7 +22,7 @@ class PsiStructureProvider {
 
         while (result == null && attempts < maxAttempts) {
             attempts++
-            try {
+            runCatchingCancellable {
                 val project = psiFiles
                     .map { it.project }
                     .firstOrNull { !it.isDisposed } ?: error("Project not available")
@@ -60,9 +56,7 @@ class PsiStructureProvider {
                     .submit(Dispatchers.Default.asExecutor())
 
                 result = future.await()
-            } catch (e: CancellationException) {
-                throw e
-            } catch (_: Exception) {
+            }.onFailure {
                 delay(DELAY_RESTART_READ_ACTION)
             }
         }