Update README.md

Author: igozdev

README.md

@@ -1 +1,30 @@
-# charimpl
+# charimpl
+> Compile-time header-only `char` implementation checking for **C++03**/**11**/**14**/**17**/**20**
+
+[![license][badge.license]][license]
+[![release][badge.release]][release]
+[![godbolt][badge.godbolt]][godbolt]
+
+[badge.license]: https://img.shields.io/badge/license-mit-blue.svg
+[license]: https://github.com/igozdev/charimpl/blob/main/LICENSE
+
+[badge.release]: https://img.shields.io/github/release/igozdev/charimpl.svg
+[release]: https://github.com/igozdev/charimpl/releases/latest
+
+[badge.godbolt]: https://img.shields.io/badge/try_it-on_godbolt-indigo.svg
+[godbolt]: https://godbolt.org/z/rGqM1YMsd
+
+# Example
+```cpp
+#include <iostream>
+#include <charimpl/charimpl.hpp>
+
+int main()
+{
+    std::cout << std::boolalpha
+        << charimpl::is_ascii() << std::endl
+        << charimpl::is_ebcdic() << std::endl
+        << charimpl::is_ebcdic037() << std::endl
+        << charimpl::is_ebcdic1047() << std::endl;
+}
+```