Add LSP based Hop targets

[IndianBoy42]

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Everything in https://github.com/nvim-telescope/telescope.nvim/blob/master/lua/telescope/builtin/lsp.lua would be a good starting point

If there is a plugin/library with wrappers that provides easier way of getting the above as a list of positions that would be great, otherwise we have to start writing it ourselves. The telescope repository is a good reference as they too have to get the information as a list of positions