added scheme and kotlin to code_search

crates/g3-core/examples/test_code/Example.kt

@@ -0,0 +1,24 @@
+package com.example
+
+class Person(val name: String, val age: Int) {
+    fun greet() {
+        println("Hello, I'm $name")
+    }
+    
+    fun getAge(): Int {
+        return age
+    }
+}
+
+interface Greeter {
+    fun sayHello()
+}
+
+fun main() {
+    val person = Person("Alice", 30)
+    person.greet()
+}
+
+fun add(a: Int, b: Int): Int {
+    return a + b
+}

crates/g3-core/examples/test_code/example.rkt

@@ -0,0 +1,24 @@
+#lang racket
+
+(define (greet name)
+  (printf "Hello, ~a!\n" name))
+
+(define (add x y)
+  (+ x y))
+
+(define (factorial n)
+  (if (<= n 1)
+      1
+      (* n (factorial (- n 1)))))
+
+(struct person (name age) #:transparent)
+
+(define (person-greet p)
+  (printf "Hello, I'm ~a\n" (person-name p)))
+
+(greet "World")
+(displayln (add 5 3))
+(displayln (factorial 5))
+
+(define alice (person "Alice" 30))
+(person-greet alice)