Feat: Add target branch to details panel (#160)

This is a PATCH release, it adds the target branch to the details panel in the summary view.

doc/gitlab.nvim.txt

@@ -187,6 +187,7 @@ you call this function with no values the defaults will be used:
 	  "assignees",
 	  "reviewers",
 	  "branch",
+	  "target_branch",
 	  "pipeline",
 	  "labels",
         },

lua/gitlab/actions/summary.lua

@@ -131,6 +131,7 @@ M.build_info_lines = function()
     reviewers = { title = "Reviewers", content = u.make_readable_list(info.reviewers, "name") },
     branch = { title = "Branch", content = info.source_branch },
     labels = { title = "Labels", content = u.make_comma_separated_readable(info.labels) },
+    target_branch = { title = "Target Branch", content = state.INFO.target_branch },
     pipeline = {
       title = "Pipeline Status",
       content = function()

lua/gitlab/state.lua

@@ -88,8 +88,9 @@ M.settings = {
       "conflicts",
       "assignees",
       "reviewers",
-      "branch",
       "pipeline",
+      "branch",
+      "target_branch",
       "labels",
     },
   },