Add file and request libs

libs/file.sols

@@ -0,0 +1,6 @@
+def file_Read(string file) string {}
+def file_Write(string file, string content) {}
+
+ground {
+    extern "fileio"
+}

libs/request.sols

@@ -0,0 +1,6 @@
+def request_Get(string url) string {}
+def request_Post(string url, string data) string {}
+
+ground {
+    extern "request"
+}