Allow use of --imply_local when calling DiffviewOpen, allowing LSP use and linting in MR review (#162)

Adds the ability to use the local filesystem when doing reviews by passing the `--imply-local` flag to the reviewer. This functionality is disabled by default. If users make changes to their filesystem (the files are "dirty") the default reviewer (hashes not files) will be use. This is a MINOR release.

lua/gitlab/state.lua

@@ -13,6 +13,11 @@ M.settings = {
   log_path = (vim.fn.stdpath("cache") .. "/gitlab.nvim.log"),
   config_path = nil,
   reviewer = "diffview",
+  reviewer_settings = {
+    diffview = {
+      imply_local = false,
+    },
+  },
   attachment_dir = "",
   help = "?",
   popup = {