chore(nvim): Neovim config cleanups

- Use newer installation for Lazy.nvim
- Treesitter: ensure_install sql, bash, jsonc, python, dockerfile
  plugins
- Completion: Use <ctrl+y> to accept. <enter> to accept was interfering
  with completions that were suggested at end of the line and you don't
  want to accept but just want to go to the next line
- Snacks: disble the abhorrent *smooth* scrolling
- Whichkey: More time before pop-up shows (450ms)

common/.config/nvim/lua/plugins/code-completion.lua

@@ -36,7 +36,7 @@ return {
             -- 'enter' for mappings similar to 'super-tab' but with 'enter' to accept
             -- See the full "keymap" documentation for information on defining your own keymap.
             keymap = {
-                preset = "enter",
+                preset = "super-tab",
                 ["<C-y>"] = { "select_and_accept" },
 
                 ["<Tab>"] = { "snippet_forward", "fallback" },