Introduction

This release mainly contains cmd/codegen improvements as well as some backend changes that makes backend interface easier to use.

Release highlights

codegen module (cmd/codegen) received several updates and cleanups incuding:
- it uses an external flag package so writing flags is easier now. It also supports long version of flags (e.g. -d and --definitions)
- Preset was extended with several fields including imgui-specific stuff from argument/return_wrapper
- gofumpt and goimports are now integrated with codegen so that you don't need to run them on your own.
- documentation was added.
backend.WindowCloseCallback: type was changed func(b Backend[T]) -> func() (it is not generic anymore).

Codegen refactor and cleanup by @gucio321 in #391
make gengo_callbacks separated gengo unit by @gucio321 in #392
remove files prefix by @gucio321 in #393
Logger updates by @gucio321 in #394
Remove hardcoded imgui refs by @gucio321 in #395
build(deps): bump github.com/hajimehoshi/ebiten/v2 from 2.8.4 to 2.8.5 by @dependabot in #396
change(backend): dont take Backend as an arg to WIndowCloseCallback by @gucio321 in #398
Remove hardcoded IDs by @gucio321 in #400
Codegen: compile-in gofumpt by @gucio321 in #401
codegen: documentation and cmdline args cleanup by @gucio321 in #402

Full Changelog: v1.2.0...v1.3.0