Use the LazyVim oxc extra instead of hand-rolled oxlint config

The oxlint LSP now enables type-aware linting on its own when tsgolint is
present and .oxlintrc.json mentions typescript, and ships :LspOxlintFixAll --
which is what the oxlint_fix function reimplemented by shelling out to the CLI.
The extra also sets fixKind = "all" and prefers the top-level oxlint config in
monorepos. Fixes now apply as a workspace edit instead of writing to disk and
reloading.

oxfmt takes js/ts/json/vue over prettier; prettier keeps css/html/yaml/markdown.
Add oxlint to mason so it resolves outside projects with a local install.

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

lua/plugins/lspconfig.lua

@@ -1,25 +1,34 @@
 return {
-  "neovim/nvim-lspconfig",
-  opts = {
-    diagnostics = {
-      virtual_text = false,
-      virtual_lines = { current_line = true },
-    },
-    servers = {
-      clangd = {
-        -- removing .proto from the list of filetypes since clangd doesn't seem to be able to parse them
-        filetypes = { "c", "cpp", "objc", "objcpp", "cuda" },
+  {
+    "neovim/nvim-lspconfig",
+    opts = {
+      diagnostics = {
+        virtual_text = false,
+        virtual_lines = { current_line = true },
+      },
+      servers = {
+        clangd = {
+          -- removing .proto from the list of filetypes since clangd doesn't seem to be able to parse them
+          filetypes = { "c", "cpp", "objc", "objcpp", "cuda" },
+        },
+        oxlint = {
+          keys = {
+            { "<leader>cx", "<cmd>LspOxlintFixAll<cr>", desc = "Oxlint Fix All" },
+          },
+        },
+      },
+      -- Disable eslint formatting as it's slow and timing out on big projects
+      -- taken from
+      -- https://github.com/LazyVim/LazyVim/pull/4225/files
+      setup = {
+        eslint = function()
+          return
+        end,
       },
-      -- Disable oxlint LSP - using nvim-lint with CLI instead for type-aware support
-      oxlint = { enabled = false },
-    },
-    -- Disable eslint formatting as it's slow and timing out on big projects
-    -- taken from
-    -- https://github.com/LazyVim/LazyVim/pull/4225/files
-    setup = {
-      eslint = function()
-        return
-      end,
     },
   },
+  {
+    "mason-org/mason.nvim",
+    opts = { ensure_installed = { "oxlint" } },
+  },
 }