Feat: add Zendesk data source integration with configuration and sync capabilities (#12344)

### What problem does this PR solve?
issue:
#12313
change:
add Zendesk data source integration with configuration and sync
capabilities

### Type of change

- [x] New Feature (non-breaking change which adds functionality)

common/data_source/config.py

@@ -58,8 +58,9 @@ class DocumentSource(str, Enum):
     GITHUB = "github"
     GITLAB = "gitlab"
     IMAP = "imap"
+    ZENDESK = "zendesk"
+
 
-    
 class FileOrigin(str, Enum):
     """File origins"""
     CONNECTOR = "connector"
@@ -271,6 +272,10 @@ IMAP_CONNECTOR_SIZE_THRESHOLD = int(
     os.environ.get("IMAP_CONNECTOR_SIZE_THRESHOLD", 10 * 1024 * 1024)
 )
 
+ZENDESK_CONNECTOR_SKIP_ARTICLE_LABELS = os.environ.get(
+    "ZENDESK_CONNECTOR_SKIP_ARTICLE_LABELS", ""
+).split(",")
+
 _USER_NOT_FOUND = "Unknown Confluence User"
 
 _COMMENT_EXPANSION_FIELDS = ["body.storage.value"]