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docs: retranslate the 简体中文 README and manual; pypi: pip install mcpp-… #729

Job	Run time
invariants (macos-arm64)	4m 38s
invariants (linux-x86_64)	4m 22s
invariants (windows-x86_64)	4m 34s
invariants (linux-aarch64)	4m 59s
scan (linux-aarch64)	3m 56s
scan (macos-arm64)	5m 39s
scan (linux-x86_64)	9m 17s
scan (windows-x86_64)	9m 33s
coverage (every host the table names was scanned)	7s
	47m 5s