Migrate to lazy.nvim with more lua config

lua/plugins/metals.lua

@@ -0,0 +1,58 @@
+return {
+  'scalameta/nvim-metals',
+  dependencies = {
+    'nvim-lua/plenary.nvim',
+    'mfussenegger/nvim-dap',
+    "hrsh7th/cmp-nvim-lsp",
+  },
+  config = function()
+    local metals_config = require('metals').bare_config()
+    metals_config.init_options.statusBarProvider = "on"
+    metals_config.settings = {
+      showImplicitArguments = true,
+      superMethodLensesEnabled = true,
+    }
+    metals_config.on_attach = function(client, bufnr)
+      require("metals").setup_dap()
+      require("my_lsp").on_attach(client, bufnr)
+    end
+    metals_config.capabilities = require("cmp_nvim_lsp").default_capabilities()
+    -- Debug settings if you're using nvim-dap
+    local dap = require("dap")
+    dap.configurations.scala = {
+      {
+        type = "scala",
+        request = "launch",
+        name = "RunOrTest",
+        metals = {
+          runType = "runOrTestFile",
+          --args = { "firstArg", "secondArg", "thirdArg" }, -- here just as an example
+        },
+      },
+      {
+        type = "scala",
+        request = "launch",
+        name = "Test Target",
+        metals = {
+          runType = "testTarget",
+        },
+      },
+    }
+
+
+    -- Autocmd that will actually be in charging of starting the whole thing
+    local nvim_metals_group = vim.api.nvim_create_augroup("nvim-metals", { clear = true })
+    vim.api.nvim_create_autocmd("FileType", {
+      -- NOTE: You may or may not want java included here. You will need it if you
+      -- want basic Java support but it may also conflict if you are using
+      -- something like nvim-jdtls which also works on a java filetype autocmd.
+      pattern = { "scala", "sbt" },
+      callback = function()
+        require("metals").initialize_or_attach(metals_config)
+      end,
+      group = nvim_metals_group,
+    })
+
+    return metals_config
+  end
+}