feat: add mergeability checks to summary view

doc/gitlab.nvim.txt

@@ -312,6 +312,39 @@ you call this function with no values the defaults will be used:
           "squash",
           "labels",
           "web_url",
+          "mergeability_checks", -- See more detailed configuration below
+        },
+        -- Settings for the mergeability checks in the summary view
+        -- https://docs.gitlab.com/api/graphql/reference/#mergeabilitycheckidentifier
+        mergeability_checks = {
+          -- Symbols for individual check statuses. Set values to `false` to hide checks with given status from summary
+          statuses = {
+            SUCCESS = "✅",
+            CHECKING = "🔁",
+            FAILED = "❌",
+            WARNING = "⚠️",
+            INACTIVE = "💤",
+          },
+          -- Descriptions for individual checks. Set values to `false` to hide given checks from summary
+          checks = {
+            CI_MUST_PASS = "Pipeline must succeed",
+            COMMITS_STATUS = "Source branch exists and contains commits",
+            CONFLICT = "Merge conflicts must be resolved",
+            DISCUSSIONS_NOT_RESOLVED = "Open threads must be resolved",
+            DRAFT_STATUS = "Merge request must not be draft",
+            JIRA_ASSOCIATION_MISSING = "Title or description references a Jira issue",
+            LOCKED_LFS_FILES = "All LFS files must be unlocked",
+            LOCKED_PATHS = "All paths must be unlocked",
+            MERGE_REQUEST_BLOCKED = "Merge request is not blocked",
+            MERGE_TIME = "Merge is not blocked due to a scheduled merge time",
+            NEED_REBASE = "Merge request must be rebased, fast-forward merge is not possible",
+            NOT_APPROVED = "All required approvals must be given",
+            NOT_OPEN = "Merge request must be open",
+            REQUESTED_CHANGES = "Change requests must be approved by the requesting user",
+            SECURITY_POLICY_VIOLATIONS = "Security policies are satisfied",
+            STATUS_CHECKS_MUST_PASS = "External status checks pass",
+            TITLE_REGEX = "Title matches the expected regex",
+          },
         },
       },
       discussion_signs = {