feat: support crlfmt (nvim-lua#470)

Author: hougesen

lua/conform/formatters/crlfmt.lua

@@ -0,0 +1,10 @@
+---@type conform.FileFormatterConfig
+return {
+  meta = {
+    url = "https://github.com/cockroachdb/crlfmt",
+    description = "Formatter for CockroachDB's additions to the Go style guide.",
+  },
+  command = "crlfmt",
+  args = { "-w", "$FILENAME" },
+  stdin = false,
+}