🚀 add coroutine library(beta) and lib function settimer&maketimestamp

test/coroutine.nas

@@ -0,0 +1,25 @@
+# coroutine.nas by ValKmjolnir
+# 2022/5/19
+var fib=func(){
+    var (a,b)=(1,1);
+    if(coroutine.running()){
+        coroutine.yield(a);
+        coroutine.yield(b);
+    }
+    while(1){
+        (a,b)=(b,a+b);
+        if(coroutine.running())
+            coroutine.yield(b);
+        else
+            break;
+    }
+    return;
+}
+
+var co=[coroutine.create(fib),coroutine.create(fib)];
+for(var i=0;i<45;i+=1){
+    var res=[coroutine.resume(co[0]),coroutine.resume(co[1])];
+    println('coroutine[0]:',res[0]==nil?nil:res[0][0],'\ncoroutine[1]:',res[1]==nil?nil:res[1][0]);
+}
+
+fib();