📚 docs(manual): Write some content for examples.

Author: make-github-pseudonymous-again

doc/manual/example.md

@@ -1 +1,15 @@
 # Examples
+
+> More examples in [the test files](https://github.com/aureooms/js-integer/tree/master/test/src).
+
+```js
+import { ZZ } from '@aureooms/js-integer' ;
+
+const a = ZZ.from( 'dead' , 16 ) ;
+const b = ZZ.from( '101010' , 2 ) ;
+
+const c = a.add(b);
+console.log(c.toString()); // 57047
+```
+
+**Note**: decimals are not supported in this library.