Improve startuptime | remove un-needed plugins | lazy load plugin highlights too

removed nvim-gps as nvim-navic or winbar.nvim will be added when v0.8 neovim releases. Removed lsp signature as I was able to emulate showing args with the default signature help() window

lua/plugins/configs/alpha.lua

@@ -4,6 +4,8 @@ if not present then
    return
 end
 
+require("base46").load_highlight "alpha"
+
 local function button(sc, txt, keybind)
    local sc_ = sc:gsub("%s", ""):gsub("SPC", "<leader>")