GitLab

* [doc] add checkpoint related docstr for booster

* [doc] add en checkpoint doc

* [doc] add zh checkpoint doc

* [doc] add booster checkpoint doc in sidebar

* [doc] add cuation about ckpt for plugins

* [doc] add doctest placeholder

* [doc] add doctest placeholder

* [doc] add doctest placeholder

* [doc] add en booster plugins doc

* [doc] add booster plugins doc in sidebar

* [doc] add zh booster plugins doc

* [doc] fix zh booster plugin translation

* [doc] reoganize tutorials order of basic section

* [devops] force sync to test ci

* [doc] add en cluster utils doc

* [doc] add zh cluster utils doc

* [doc] add cluster utils doc in sidebar

* [booster] update booster tutorials#3717

* [booster] update booster tutorials#3717, fix

* [booster] update booster tutorials#3717, update setup doc

* [booster] update booster tutorials#3717, update setup doc

* [booster] update booster tutorials#3717, update setup doc

* [booster] update booster tutorials#3717, update setup doc

* [booster] update booster tutorials#3717, update setup doc

* [booster] update booster tutorials#3717, update setup doc

* [booster] update booster tutorials#3717, rename colossalai booster.md

* [booster] update booster tutorials#3717, rename colossalai booster.md

* [booster] update booster tutorials#3717, rename colossalai booster.md

* [booster] update booster tutorials#3717, fix

* [booster] update booster tutorials#3717, fix

* [booster] update tutorials#3717, update booster api doc

* [booster] update tutorials#3717, modify file

* [booster] update tutorials#3717, modify file

* [booster] update tutorials#3717, modify file

* [booster] update tutorials#3717, modify file

* [booster] update tutorials#3717, modify file

* [booster] update tutorials#3717, modify file

* [booster] update tutorials#3717, modify file

* [booster] update tutorials#3717, fix reference link

* [booster] update tutorials#3717, fix reference link

* [booster] update tutorials#3717, fix reference link

* [booster] update tutorials#3717, fix reference link

* [booster] update tutorials#3717, fix reference link

* [booster] update tutorials#3717, fix reference link

* [booster] update tutorials#3717, fix reference link

* [booster] update tutorials#3713

* [booster] update tutorials#3713, modify file

* [release] v0.2.3

* polish code