feat(core): add compile and run pipeline

src/main/kotlin/lumen/Pipeline.kt

@@ -0,0 +1,43 @@
+package lumen
+
+import lumen.ast.Stmt
+import lumen.compiler.Compiler
+import lumen.lexer.Lexer
+import lumen.lexer.Token
+import lumen.module.ModuleLoader
+import lumen.parser.Parser
+import lumen.runtime.FunctionValue
+import lumen.vm.Vm
+import java.io.File
+
+object Lumen {
+    fun tokenize(source: String): List<Token> = Lexer(source).scan()
+
+    fun parse(source: String): List<Stmt> = Parser(tokenize(source)).parseProgram()
+
+    fun compile(source: String): FunctionValue = Compiler().compile(parse(source))
+
+    fun run(source: String, out: Appendable = System.out): Value {
+        val script = compile(source)
+        return Vm(out).interpret(script)
+    }
+
+    fun runToString(source: String): String {
+        val buffer = StringBuilder()
+        run(source, buffer)
+        return buffer.toString()
+    }
+
+    fun runFile(file: File, out: Appendable = System.out): Value {
+        val vm = Vm(out)
+        return ModuleLoader(vm).load(file)
+    }
+
+    fun runFileToString(path: String): String {
+        val buffer = StringBuilder()
+        runFile(File(path), buffer)
+        return buffer.toString()
+    }
+}
+
+typealias Value = lumen.runtime.Value