neovim: fix a bunch of small issues

- snack explorer now opens on the neovim is open at instead of the go
module
- remove obsolete linting stuff

neovim/dot-config/nvim/lua/config/keymaps.lua

@@ -15,8 +15,9 @@ local function toggle_or_focus_explorer()
     return
   end
 
-  -- No explorer open; open one at the project root
+  -- No explorer open; open one at the actual working directory.
-  Snacks.explorer({ cwd = LazyVim.root() })
+  -- (inside the explorer, <c-r> toggles between project cwd and module root)
+  Snacks.explorer()
 end
 
 vim.keymap.set("n", "<leader>e", toggle_or_focus_explorer, { desc = "Explorer (toggle/focus)" })

neovim/dot-config/nvim/lua/plugins/lint.lua

@@ -0,0 +1,11 @@
+return {
+  {
+    "mfussenegger/nvim-lint",
+    optional = true,
+    opts = {
+      linters_by_ft = {
+        sql = { "sqlfluff" },
+      },
+    },
+  },
+}

neovim/dot-config/nvim/lua/plugins/lspconfig.lua

@@ -6,7 +6,6 @@ return {
         gopls = {
           settings = {
             gopls = {
-              experimentalWorkspaceModule = true,
               hints = {
                 assignVariableTypes = false,
                 -- compositeLiteralFields = false,