fix: convert some warnings to errors

lua/git/repo.lua

@@ -56,7 +56,7 @@ function Repo:_fetch_status()
         { cwd = self.worktree, text = true },
         vim.schedule_wrap(function(obj)
             if obj.code ~= 0 then
-                util.warning(
+                util.error(
                     "git status failed: %s",
                     vim.trim(obj.stderr or "")
                 )
@@ -95,7 +95,7 @@ end
 function Repo:start_watcher()
     local watcher, err = vim.uv.new_fs_event()
     if not watcher then
-        util.warning(
+        util.error(
             "git: failed to create fs_event for %s: %s",
             self.gitdir,
             err
@@ -117,7 +117,7 @@ function Repo:start_watcher()
         end
     )
     if not ok then
-        util.warning("failed to watch %s: %s", self.gitdir, tostring(start_err))
+        util.error("failed to watch %s: %s", self.gitdir, tostring(start_err))
         watcher:close()
         return
     end
@@ -323,7 +323,7 @@ function M.resolve(arg)
         f:close()
         local rel = content:match("gitdir:%s*(%S+)")
         if not rel then
-            util.warning(".git file at %s has no `gitdir:` line", found)
+            util.error(".git file at %s has no `gitdir:` line", found)
             return nil
         end
         gitdir = vim.fs.normalize(