Add AI inline completion via minuet + OpenCode Go

Configure minuet-ai.nvim with the OpenCode Go chat completions endpoint
(deepseek-v4-flash, thinking disabled) and wire it into blink.cmp as a
completion source with manual <A-y> trigger.

dot_config/nvim/lua/plugins/init.lua

@@ -17,6 +17,7 @@ vim.api.nvim_create_autocmd("PackChanged", {
 require("plugins.theme")
 require("plugins.mini-icons")
 require("plugins.treesitter")
+require("plugins.minuet")
 require("plugins.blink")
 require("plugins.whichkey")
 require("plugins.lualine")