Add emoji model for other language

Signed-off-by: Carl Schwan <carl@carlschwan.eu>

tools/README.md

@@ -0,0 +1,19 @@
+# Emoji Model builder
+
+This folder contains the tool to build all emoji mapping.
+
+## Requirements
+
+* composer
+* PHP
+
+## Update the rules
+
+To update the rules, you need to update the version of `unicode-org/cldr` in the
+`composer.json` file, then run `make update`.
+
+Finally, run the following command:
+
+```bash
+make build
+```