dubu-rect-pack v1.0

rect packer (#1)

* basic setup

* Formatted files using clang-format

* added basic unit test

* fixed compilation errer

* use gcc-10

* use gcc-10

* use gcc-10

* updated actions

* updated actions

* updated actions

* updated actions

* updated actions

* updated actions

* updated actions

* implemented basic packing algorithm

* removed ranges include

* fixed compilation errors

* updated readme

* updated readme

Co-authored-by: github-actions <41898282+github-actions[bot]@users.noreply.github.com>