Add table functions

Update lua_api.md to 5.8.0

lua_api.txt -> lua_api.md

Update it to d197ff0f9dc55c165cfd7e84a41e2c0891c85111, which reformats
the file.

Update lua_api.txt to 5cd6a22dd3b4738c89e436aedb88afb5cf44c9d8

Right before it was converted to markdown

Add translation functions

Fix typos

Apply stylua

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