FIR IDE: Add collecting scopes for declarations

- They are required to perform completion in default arguments,
return types, and other declaration parts (except for body)

compiler/fir/resolve/src/org/jetbrains/kotlin/fir/resolve/transformers/body/resolve/FirBodyResolveTransformer.kt

@@ -85,6 +85,8 @@ open class FirBodyResolveTransformer(
 
     open fun onBeforeStatementResolution(statement: FirStatement) {}
 
+    open fun onBeforeDeclarationContentResolve(declaration: FirDeclaration) {}
+
     // ------------------------------------- Expressions -------------------------------------
 
     override fun transformExpression(expression: FirExpression, data: ResolutionMode): CompositeTransformResult<FirStatement> {

compiler/fir/resolve/src/org/jetbrains/kotlin/fir/resolve/transformers/body/resolve/FirDeclarationsResolveTransformer.kt

@@ -53,6 +53,7 @@ open class FirDeclarationsResolveTransformer(transformer: FirBodyResolveTransfor
     private fun transformDeclarationContent(
         declaration: FirDeclaration, data: ResolutionMode
     ): CompositeTransformResult<FirDeclaration> {
+        transformer.onBeforeDeclarationContentResolve(declaration)
         return context.withContainer(declaration) {
             declaration.replaceResolvePhase(transformerPhase)
             transformer.transformDeclarationContent(declaration, data)