build: remove presubmit dependency on luvit-meta

As discussed in https://github.com/yetone/avante.nvim/pull/2536 the
project should either use luv bindings from luals or luvit-meta
library, but not both, as they conflict with each other (especially
with uv.uv_timer_t). Given that other projects such as kickstart.nvim
and lazydev.nvim are switching to use the former, we should do the same
and drop luvit-meta dependency.

Also adjust code that was using luvit-meta's annotations for timers.

.github/workflows/lua.yaml

@@ -91,7 +91,6 @@ jobs:
             "ibhagwan/fzf-lua"
             "nvim-tree/nvim-web-devicons"
             "zbirenbaum/copilot.lua"
-            "Bilal2453/luvit-meta"
             "folke/lazy.nvim"
           )
           for dep in "${DEPS[@]}"; do