update README

add flag-[CODE] emojis to parser

add emoji string parser (#4)

* add string parser

* add fmt wrappers

* add map generator

* rename string file to parser

* fix consecutive colon issue

* add tests for parser

* add missing test cases

* add test for fmt

* update README

* add string parser to usage readme

* format usage example

* add another example

* fix example

* update todo

update README.md

generator: add emoji constant generator (#1)

* generator: add initial constant generator
* generator: add template file
* finish generator

doc: add basic documentation