[Idea]: Make configuration tables read-only during runtime

[vhyrro]

The documentation generator performs pretty heavy analysis of modules when generating its wiki. Because of this, it assumes that the public configuration has not been altered (the types of data have remained the same).

This contract can be freely broken by unsuspecting modules, leading the documentation generator to break in unpredictable ways. It may make sense to put a guard on the table after the user configuration has been applied to prevent data types from being altered.

This would involve wrapping the config.public table in a metatable which verifies that every write to __newindex preserves the type.

[pysan3]

Just fyi I like how lua_ls overwrites shift left/right operator (>>, <<) to define and check config types.

https://github.com/LuaLS/lua-language-server/blob/master/script/config/template.lua