added support for metals

lua/plugins/languages/scala.lua

@@ -0,0 +1,28 @@
+return {
+    "scalameta/nvim-metals",
+    dependencies = {
+        "nvim-lua/plenary.nvim",
+    },
+    ft = { "scala", "sbt" },
+    opts = function()
+        local metals_config = require("metals").bare_config()
+
+        metals_config.settings = {
+            showImplicitArguments = true,
+        }
+
+        metals_config.capabilities = require("cmp_nvim_lsp").default_capabilities()
+
+        return metals_config
+    end,
+    config = function(self, metals_config)
+        local nvim_metals_group = vim.api.nvim_create_augroup("nvim-metals", { clear = true })
+        vim.api.nvim_create_autocmd("FileType", {
+            pattern = self.ft,
+            callback = function()
+                require("metals").initialize_or_attach(metals_config)
+            end,
+            group = nvim_metals_group,
+        })
+    end,
+}