Drop opencode and supermaven, fix prettier, move path-copy keymaps

- Remove the opencode.nvim and supermaven-nvim plugin specs.
- formatting.lua: stop hardcoding prettier's path. It pointed at
  mise/installs/node/22.20.0, which no longer exists (now 24.19.0), so
  conform silently failed to format. Dropping `command` lets conform
  inherit its built-in definition and resolve prettier on PATH, which
  mason.nvim populates.
- keymaps.lua: move the file-path copy maps from <leader>cy/cY to
  <leader>yp/yP.
- Pick up Omarchy Quattro's remote_clipboard.lua and the news-alert
  suppression, plus the lazy-lock/lazyvim.json churn from the upgrade.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

lua/config/options.lua

@@ -1,3 +1,4 @@
+require("config.remote_clipboard").setup()
 -- Options are automatically loaded before lazy.nvim startup
 -- Default options that are always set: https://github.com/LazyVim/LazyVim/blob/main/lua/lazyvim/config/options.lua
 -- Add any additional options here