[API] Bindings for ImGuiColorTextEdit (#79)

* Add ImGuiColorTextEdit submodule

* ImGuiColorTextEdit integration

* Remove unused Identifier class (oops)

* Fix checkstyle

* Small tweaks and fixes

* Remove empty line before imports

Co-authored-by: SpaiR <klimbetoo@gmail.com>

.gitmodules

@@ -13,3 +13,6 @@
 [submodule "include/implot"]
 	path = include/implot
 	url = https://github.com/epezent/implot.git
+[submodule "include/ImGuiColorTextEdit"]
+	path = include/ImGuiColorTextEdit
+	url = https://github.com/BalazsJako/ImGuiColorTextEdit