feat: add comprehensive stage descriptions for CreateTopics API

Introduce new stage descriptions for the CreateTopics API, covering various scenarios including handling invalid topic names, partition values, replication factors, and authorization checks. This update enhances the documentation by providing clear guidelines for validation, error handling, and expected responses, ensuring a thorough understanding of the CreateTopics functionality.

Author: ryan-gang

stage_descriptions/stages.yaml renamed to all-stages.md

@@ -12,17 +12,17 @@
 - CreateTopics with Invalid Request (Duplicate topic names in single request)
 
 
-  1. Topic Name Validation - INVALID_TOPIC_EXCEPTION (17)
-  - Empty topic name or "." or ".."
-  - Length > 249 characters
-  - Invalid characters (only ASCII alphanumerics, '.', '_', '-')
-  - Internal topic collision detection
+1. Topic Name Validation - INVALID_TOPIC_EXCEPTION (17)
+- Empty topic name or "." or ".."
+- Length > 249 characters
+- Invalid characters (only ASCII alphanumerics, '.', '_', '-')
+- Internal topic collision detection
 
 
 
-Stage CT8: CreateTopics with Invalid Parameters
+Stage CTX: CreateTopics with Invalid Parameters
 - Handle negative/zero partitions, invalid replication factors
 - Duplicate topic names in single request
 - Error codes: INVALID_PARTITIONS (37), INVALID_REPLICATION_FACTOR (38)
 
-- CT8: Topic-specific configurations
+Stage CTX: Topic-specific configurations