feat(lang): add bash support

fix(lang/bash): remove duplicate bash treesitter

lua/lazyvim/plugins/extras/lang/bash.lua

@@ -0,0 +1,32 @@
+return {
+  recommended = function()
+    return LazyVim.extras.wants({
+      ft = "sh",
+    })
+  end,
+
+  -- LSP
+  {
+    "williamboman/mason.nvim",
+    opts = function(_, opts)
+      if type(opts.ensure_installed) == "table" then
+        vim.list_extend(opts.ensure_installed, {
+          "bash-language-server",
+          "shellcheck",
+          "shfmt",
+        })
+      end
+    end,
+  },
+  {
+    "neovim/nvim-lspconfig",
+    opts = {
+      servers = {
+        bashls = {},
+      },
+    },
+  },
+
+  -- Treesitter for bash is installed by default.
+  -- Linter(shellchecker) and formatter(shfmt) can be triggered by bashls.
+}