removed antigravity, related keybind, and removed old codecompanion keybinds

lua/plugins/antigravity.lua

@@ -1,13 +0,0 @@
-return {
-    "NakLast/antigravity-cli.nvim",
-    config = function()
-        require("antigravity").setup({
-            -- You can override the default command here if needed
-            cmd = "agy",
-            width_ratio = 0.4,
-            height_ratio = 0.8,
-            border = "rounded",
-            style = "vsplit",
-        })
-    end
-}