Fix for KT-13695, KT-13159 J2K: Invalid conversion context setup for plain text pastes

Extending, Implementing, imports from paste target file previously not implemented

idea/testData/copyPaste/plainTextConversion/Override.dependency.java

@@ -0,0 +1,5 @@
+package test;
+
+public class JavaParent {
+    public void subject() {}
+}

idea/testData/copyPaste/plainTextConversion/Override.expected.kt

@@ -0,0 +1,6 @@
+import test.JavaParent
+
+class KotlinChild : JavaParent() {
+    override fun subject() {
+    }
+}

idea/testData/copyPaste/plainTextConversion/Override.to.kt

@@ -0,0 +1,5 @@
+import test.JavaParent
+
+class KotlinChild : JavaParent() {
+    <caret>
+}

idea/testData/copyPaste/plainTextConversion/Override.txt

@@ -0,0 +1 @@
+@Override public void subject() {}

idea/testData/copyPaste/plainTextConversion/OverrideInterface.dependency.java

@@ -0,0 +1,7 @@
+package test;
+
+import org.jetbrains.annotations.Nullable;
+
+public interface JavaInterface {
+    void subject(@Nullable String s)
+}

idea/testData/copyPaste/plainTextConversion/OverrideInterface.expected.kt

@@ -0,0 +1,6 @@
+import test.JavaInterface
+
+class KotlinChild : JavaInterface() {
+    override fun subject(s: String?) {
+    }
+}

idea/testData/copyPaste/plainTextConversion/OverrideInterface.to.kt

@@ -0,0 +1,5 @@
+import test.JavaInterface
+
+class KotlinChild : JavaInterface() {
+    <caret>
+}

idea/testData/copyPaste/plainTextConversion/OverrideInterface.txt

@@ -0,0 +1 @@
+@Override public void subject(String s) {}