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* [doc]update gradient accumulation

* [doc]update gradient accumulation

* [doc]update gradient accumulation

* [doc]update gradient accumulation

* [doc]update gradient accumulation, fix

* [doc]update gradient accumulation, fix

* [doc]update gradient accumulation, fix

* [doc]update gradient accumulation, add sidebars

* [doc]update gradient accumulation, fix

* [doc]update gradient accumulation, fix

* [doc]update gradient accumulation, fix

* [doc]update gradient accumulation, resolve comments

* [doc]update gradient accumulation, resolve comments

* fix

* [doc] update gradient clipping document

* [doc] update gradient clipping document

* [doc] update gradient clipping document

* [doc] update gradient clipping document

* [doc] update gradient clipping document

* [doc] update gradient clipping document

* [doc] update gradient clipping doc, fix sidebars.json

* [doc] update gradient clipping doc, fix doc test

* [doc] add docstr for booster methods

* [doc] fix autodoc

* [doc] add en cluster utils doc

* [doc] add zh cluster utils doc

* [doc] add cluster utils doc in sidebar

* [doc] add test info

* [devops] update doc check ci

* [devops] add debug info

* [devops] add debug info

* [devops] add debug info

* [devops] add debug info

* [devops] add debug info

* [devops] add debug info

* [devops] add debug info

* [devops] add debug info

* [devops] add debug info

* [devops] add debug info

* [devops] remove debug info and update invalid doc

* [devops] add essential comments

Display format optimization, fix bug#3562
Specific changes
1. "This is called a column-parallel fashion" Translate to Chinese
2. use the ```math code block syntax to display a math expression as a block, No modification of formula content

Please check that the math formula is displayed correctly
If OK, I will change the format of the English version of the formula in parallel

* [zero] refactor low-level zero folder structure

* [zero] fix legacy zero import path

* [zero] fix legacy zero import path

* [zero] remove useless import

* [zero] refactor gemini folder structure

* [zero] refactor gemini folder structure

* [zero] refactor legacy zero import path

* [zero] refactor gemini folder structure

* [zero] refactor gemini folder structure

* [zero] refactor gemini folder structure

* [zero] refactor legacy zero import path

* [zero] fix test import path

* [zero] fix test

* [zero] fix circular import

* [zero] update import

* [doc] update nvme offload doc

* [doc] add doc testing cmd and requirements

* [doc] add api reference

* [doc] add dependencies

* [doc] added reference to related works

* polish code