lua: change permissions stubs ("allow" -> "mode")

[alba4k]

Describe your PR, what does it fix/add?

It fixes the lua lsp suggesting stuff like hl.permission({binary = "a", type = "b", allow = "c"}) instead of hl.permission({binary = "a", type = "b", mode = "c"})

Is it ready for merging, or does it need work?

should be good, unless this needs to be changed somewhere else? wiki is fine

furthermore, hl.monitor seems to expect scale as a string according to the lsp (unrelated to this mr), but I haven't found where that is coming from

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