quite a few fixes, overall repo cleanup and some restructurization in the stdlib

fn_test.sl

@@ -0,0 +1,21 @@
+import stdlib/stdlib.sl
+import stdlib/io.sl
+import fn.sl
+
+fn foo(int a, int b){
+    1
+    puti cr
+    return a b +;
+}
+
+fn bar(int a, int b){
+    return a + b;
+}
+
+word main
+    extend-syntax
+    foo(3, 2)
+    puti cr
+    bar(1, 2)
+    puti cr
+end