ci(docs): add document build ci logic

GitOrigin-RevId: f9a9c43a2a790a34b94d79bdc594fc690cbdeca0

imperative/python/scripts/sphinx.sh

-#!/bin/bash
-set -e
-
-# This script can be used to find WARNINGs and ERRORs hide in Python docstring.
-#
-# * Usually we use Sphinx (https://www.sphinx-doc.org/) and its' tools
-#   to build HTML documentation for Python projects, such as MegEngine. 
-# 
-# * It simulates the process of automatically extracting docstrings from source code
-#   and try generating HTML pages, just like what MegEngine documentation will do.
-#
-#   Install required Python dependence with pip then you will get following tools:
-#
-#   * sphinx-apidoc: a tool for automatic generation of Sphinx sources that,  
-#     using the autodoc extension,  document a whole package in the style of 
-#     other automatic API documentation tools. For more details: 
-#     https://www.sphinx-doc.org/en/master/man/sphinx-apidoc.html
-#
-#   * sphinx-build: generates documentation frome specific files. For more details:
-#     https://www.sphinx-doc.org/en/master/man/sphinx-build.html
-#
-# [NOTE]: You need build MegEngine first (target: develop) then run this script. 
-
-DOC_PATH=`mktemp -d`
-trap 'rm -rf "$DOC_PATH"' EXIT
-
-cd $(dirname $0)/..
-
-python3 -m pip install -r requires.txt
-python3 -m pip install -r requires-sphinx.txt
-sphinx-apidoc -f -F -e -o $DOC_PATH/source megengine "megengine/core/ops/builtin/*"
-PYTHONPATH=. sphinx-build -j auto -c . -W --keep-going \
-    $DOC_PATH/source $DOC_PATH/build