[lsp] use completion from https://github.com/darthorimar/rekot for now until we have a proper document commit

GitOrigin-RevId: 83b1f74d7b907a1670e6d4e8ce309e076f90aaa9

plugins/kotlin/base/analysis-api/analysis-api-utils/src/org/jetbrains/kotlin/idea/base/analysis/api/utils/KtSymbolFromIndexProvider.kt

@@ -306,6 +306,36 @@ class KtSymbolFromIndexProvider(
             resolveExtensionScopeWithTopLevelDeclarations.callables(nameFilter)
                 .filterNot { it.isExtension }
 
+    /**
+     * Returns top-level callables, including extensions.
+     */
+    context(KaSession)
+    @OptIn(KaExperimentalApi::class)
+    fun getTopLevelCallableSymbolsByNameFilterIncludingExtensions(
+        nameFilter: (Name) -> Boolean,
+        scope: GlobalSearchScope = analysisScope,
+        psiFilter: (KtCallableDeclaration) -> Boolean = { true }
+    ): Sequence<KaCallableSymbol> = sequenceOf(
+        KotlinTopLevelFunctionFqnNameIndex,
+        KotlinTopLevelPropertyFqnNameIndex,
+    ).flatMap { helper ->
+        val results = mutableListOf<KtCallableDeclaration>()
+        val processor = cancelableCollectFilterProcessor(results) { declaration: KtCallableDeclaration ->
+            declaration.isAcceptable(psiFilter)
+        }
+
+        helper.processAllElements(
+            project = project,
+            scope = scope,
+            filter = { nameFilter(getShortName(it)) },
+            processor = processor,
+        )
+
+        results
+    }.map { it.symbol }
+        .filterIsInstance<KaCallableSymbol>() +
+            resolveExtensionScopeWithTopLevelDeclarations.callables(nameFilter)
+
     context(KaSession)
     @OptIn(KaExperimentalApi::class)
     fun getExtensionCallableSymbolsByName(

plugins/kotlin/completion/impl-k2/src/org/jetbrains/kotlin/idea/completion/impl/k2/lookups/TailTextProvider.kt

@@ -3,6 +3,7 @@
 package org.jetbrains.kotlin.idea.completion.lookups
 
 
+import org.jetbrains.annotations.ApiStatus
 import org.jetbrains.kotlin.analysis.api.KaExperimentalApi
 import org.jetbrains.kotlin.analysis.api.KaSession
 import org.jetbrains.kotlin.analysis.api.signatures.KaCallableSignature
@@ -18,14 +19,22 @@ import org.jetbrains.kotlin.idea.completion.lookups.CompletionShortNamesRenderer
 import org.jetbrains.kotlin.name.FqName
 import org.jetbrains.kotlin.renderer.render
 
-internal object TailTextProvider {
+@ApiStatus.Internal
+object TailTextProvider {
 
     context(KaSession)
     fun getTailText(
         signature: KaCallableSignature<*>,
-    ): String = buildString {
+    ): String  {
         // use unsubstituted type when rendering receiver type of extension
         val symbol = signature.symbol
+        return getTailText(symbol)
+    }
+
+    context(KaSession)
+    fun getTailText(
+        symbol: KaCallableSymbol,
+    ): String = buildString {
         symbol.receiverType?.let { renderReceiverType(it) }
 
         symbol.getContainerPresentation(isFunctionalVariableCall = false)?.let { append(it) }