[FIR] Add a Fir node that wraps a ConeEffectDeclaration

compiler/fir/tree/tree-generator/src/org/jetbrains/kotlin/fir/tree/generator/FirTreeBuilder.kt

@@ -151,6 +151,8 @@ object FirTreeBuilder : AbstractFirTreeBuilder() {
     val implicitTypeRef = element("ImplicitTypeRef", TypeRef, typeRef)
     val composedSuperTypeRef = element("ComposedSuperTypeRef", TypeRef, typeRef)
 
+    val effectDeclaration = element("EffectDeclaration", Contracts)
+
     val contractDescription = element("ContractDescription", Contracts)
     val rawContractDescription = element("RawContractDescription", Contracts, contractDescription)
     val resolvedContractDescription = element("ResolvedContractDescription", Contracts, contractDescription)

compiler/fir/tree/tree-generator/src/org/jetbrains/kotlin/fir/tree/generator/NodeConfigurator.kt

@@ -605,12 +605,16 @@ object NodeConfigurator : AbstractFieldConfigurator<FirTreeBuilder>(FirTreeBuild
             +field(varianceType)
         }
 
+        effectDeclaration.configure {
+            +field("effect", coneEffectDeclarationType)
+        }
+
         rawContractDescription.configure {
             +field("contractCall", functionCall)
         }
 
         resolvedContractDescription.configure {
-            +fieldList("effects", effectDeclarationType)
+            +fieldList("effects", effectDeclaration)
             +fieldList("unresolvedEffects", statement)
         }
     }

compiler/fir/tree/tree-generator/src/org/jetbrains/kotlin/fir/tree/generator/Types.kt

@@ -74,7 +74,7 @@ val firScopeProviderType = type("fir.scopes", "FirScopeProvider")
 val anonymousInitializerSymbolType = type("fir.symbols.impl", "FirAnonymousInitializerSymbol")
 
 val pureAbstractElementType = generatedType("FirPureAbstractElement")
-val effectDeclarationType = type("fir.contracts.description", "ConeEffectDeclaration")
+val coneEffectDeclarationType = type("fir.contracts.description", "ConeEffectDeclaration")
 val emptyContractDescriptionType = generatedType("contracts.impl", "FirEmptyContractDescription")
 val coneDiagnosticType = generatedType("diagnostics", "ConeDiagnostic")
 val coneStubDiagnosticType = generatedType("diagnostics", "ConeStubDiagnostic")