Eric Ma

Action that we will take going forward: - Implement `__add__` on SeqLike. Dispatch pattern.

@all-contributors init

@all-contributors please add @ndousis for code

@all-contributors please add @andrewgiessel and @maxasauruswall for code

@all-contributors please add @maxasauruswall for code and docs

@all-contributors please add @ericmjl for code, docs

@all-contributors add @MihirMetkar for ideas, code

@all-contributors please add @mccaron707 for docs

@all-contributors please add @dmnfarrell for code

@all-contributors please add @farbod-nobar for code