feat: add examples

examples/unicode/README.md

@@ -0,0 +1,15 @@
+# reflect
+
+Compare TOML key after NFC canonicalization.
+
+It depends on [uni-algo](https://github.com/uni-algo/uni-algo.git).
+
+The example contains two keys that are different in bytewise comparison, but becomes the same after NFC normalization.
+
+## build
+
+Build toml11 with `-DTOML11_BUILD_EXAMPLES=ON`.
+
+```cpp
+$ cmake -B ./build/ -DTOML11_BUILD_EXAMPLES=ON
+```