Move importsDumper to compiler plugin

plugins/imports-dumper/testData/simpleCase/a/A1.kt

@@ -0,0 +1,7 @@
+package a
+
+import c.JavaC
+
+class A1 {
+    val j: JavaC = JavaC()
+}

plugins/imports-dumper/testData/simpleCase/a/A2.kt

@@ -0,0 +1,5 @@
+package a
+
+class A2 {
+    val a1: A1? = null
+}

plugins/imports-dumper/testData/simpleCase/b/B1.kt

@@ -0,0 +1,10 @@
+package b
+
+import a.*
+
+class B1 {
+    companion object {
+        val a1: A1 = A1()
+        val a2: A2 = A2()
+    }
+}

plugins/imports-dumper/testData/simpleCase/b/nestedB/B2.kt

@@ -0,0 +1,7 @@
+package b.nestedB
+
+import a.A1 as AliasedA1
+import a.A1
+
+fun foo(x: AliasedA1): Int = TODO()
+fun bar(x: A1): Int = TODO()

plugins/imports-dumper/testData/simpleCase/c/C1.kt

@@ -0,0 +1,16 @@
+package c
+
+import a.A1
+import a.A2
+import b.B1.Companion.a2
+import b.nestedB.bar
+import b.nestedB.foo
+
+class C1 {
+    val x = foo(TODO())
+    val y = bar(TODO())
+
+    val z: A1? = null
+    val t: A2? = a2
+
+}

plugins/imports-dumper/testData/simpleCase/c/JavaC.java

@@ -0,0 +1,13 @@
+package c;
+
+import a.A1;
+import b.B1;
+import b.nestedB.B2Kt;
+
+public class JavaC {
+    private void doStuff() {
+        C1 c1 = new C1();
+        B1 b1 = new B1();
+        B2Kt.bar(new A1());
+    }
+}

plugins/imports-dumper/testData/simpleCase/simpleCase.dump

@@ -0,0 +1 @@
+{"$TESTDATA_DIR$\/a\/A1.kt":["import c.JavaC"],"$TESTDATA_DIR$\/a\/A2.kt":[],"$TESTDATA_DIR$\/b\/B1.kt":["import a.*"],"$TESTDATA_DIR$\/b\/nestedB\/B2.kt":["import a.A1 as AliasedA1","import a.A1"],"$TESTDATA_DIR$\/c\/C1.kt":["import a.A1","import a.A2","import b.B1.Companion.a2","import b.nestedB.bar","import b.nestedB.foo"]}

plugins/imports-dumper/testData/simpleCase/simpleCase.out

@@ -0,0 +1 @@
+OK