'textDocument/completion' provider should check whether completion is enabled

[jllv]

lua-language-server/script/provider/provider.lua

Lines 617 to 623 in 802e13c

	m.register 'textDocument/completion' {
	---@async
	function (params)
	local uri = files.getRealUri(params.textDocument.uri)
	if not workspace.isReady(uri) then
	return nil
	end

Before checking whether the workspace is ready, I think as a first step the config value of 'Lua.completion.enable' should be checked.

Compare 'textDocument/hover' as a reference:

lua-language-server/script/provider/provider.lua

Lines 340 to 352 in 802e13c

	m.register 'textDocument/hover' {
	capability = {
	hoverProvider = true,
	},
	abortByFileUpdate = true,
	---@async
	function (params)
	local doc = params.textDocument
	local uri = files.getRealUri(doc.uri)
	if not config.get(uri, 'Lua.hover.enable') then
	return
	end
	if not workspace.isReady(uri) then