add fast_io (#1759)

* add fast_io

* fix fast_io

* improve fast_io

packages/f/fast_io/xmake.lua

@@ -0,0 +1,23 @@
+package("fast_io")
+    set_kind("library", {headeronly = true})
+    set_homepage("https://github.com/cppfastio/fast_io")
+    set_description("Significantly faster input/output for C++20")
+    set_license("MIT")
+
+    add_urls("https://github.com/cppfastio/fast_io.git")
+    add_urls("https://bitbucket.org/ejsvifq_mabmip/fast_io.git")
+    add_urls("https://gitee.com/qabeowjbtkwb/fast_io.git")
+
+    add_versions("2023.1.28", "b99b32ab429eb6256fd8de1e17fe38e4c54eb49c")
+
+    on_install("windows", "linux", "macosx", "msys", "mingw", function (package)
+        os.cp("include", package:installdir())
+    end)
+
+    on_test(function (package)
+        assert(package:check_cxxsnippets({test = [[
+            void test() {
+                print("Hello, fast_io world!\n");
+            }
+        ]]}, {configs = {languages = "c++20"}, includes = {"fast_io.h"}}))
+    end)