✨ feat(nvim): added sqlfluff extra (sql linter)

.config/nvim/lua/plugins/extras/linting/sqlfluff.lua

@@ -0,0 +1,31 @@
+return {
+  {
+    "williamboman/mason.nvim",
+    opts = function(_, opts)
+      opts.ensure_installed = opts.ensure_installed or {}
+      vim.list_extend(opts.ensure_installed, { "sqlfluff" })
+    end,
+  },
+  {
+    "mfussenegger/nvim-lint",
+    opts = function(_, opts)
+      local function add_linters(tbl)
+        for ft, linters in pairs(tbl) do
+          if opts.linters_by_ft[ft] == nil then
+            opts.linters_by_ft[ft] = linters
+          else
+            vim.list_extend(opts.linters_by_ft[ft], linters)
+          end
+        end
+      end
+
+      add_linters({
+        ["sql"] = { "sqlfluff" },
+        ["plsql"] = { "sqlfluff" },
+        ["mysql"] = { "sqlfluff" },
+      })
+
+      return opts
+    end,
+  },
+}