Chinese translation: Book section

[novusnota]

Tracking issue for translation of Book section and all subsequent pages.

Initial:

• Overview, /book/index — unassigned

Fundamentals of Tact:

• /book/types — unassigned
• /book/integers — unassigned
• /book/cells — unassigned
• /book/maps — unassigned
• /book/structs-and-messages — unassigned
• /book/optionals — unassigned
• /book/contracts — unassigned
• /book/exit-codes — unassigned

Expressiveness:

• /book/operators — unassigned
• /book/expressions — unassigned
• /book/statements — unassigned
• /book/constants — unassigned
• /book/functions — unassigned

Communication:

• /book/receive — unassigned
• /book/bounced — unassigned
• /book/external — unassigned
• /book/lifecycle — unassigned
• /book/send — unassigned
• /book/message-mode — unassigned

Going places:

• /book/deploy — unassigned
• /book/debug — unassigned
• /book/upgrades — unassigned
• /book/import — unassigned
• /book/config — unassigned
• /book/masterchain — unassigned
• /book/func — unassigned
• /book/programmatic — unassigned

To add a new page:

1. If there aren't a zh-cn/ sub-folder in docs/src/content/docs, create it
2. Create all the necessary folders for your page if they don't exist yet. For example, if the English one is in docs/src/content/docs/book/index.mdx (book/index.mdx), that means that for the Chinese version, the docs/src/content/docs/zh-cn/book/ (zh-cn/book/) folder must exist
3. Copy the respective page file from the English version onto the zh-cn/ sub-folder without changing the name of the page. If it was mode.mdx, it must stay mode.mdx. If it was book/index.mdx, it will be zh-cn/book/index.mdx and so on.
4. Translate all the English contents of the page
5. That's it!