Adds an API for mods to integrate with the IME preedit overlay implementation so that if mods provide independent text field implementations they can also make use of the preedit overlay.

This API is available at https://maven.axolotlclient.com/#/snapshots/io/github/moehreag/legacy-lwjgl3/api/1.4.0-beta.7, mods do not need to include it.

This is an unstable build, it may not function as expected.