chore: move topic route schema up two levels as slug and index are optional

public/openapi/read.yaml

@@ -168,7 +168,7 @@ paths:
   "/api/categories/{cid}/moderators":
     $ref: 'read/categories/cid/moderators.yaml'
   "/api/topic/{topic_id}/{slug}/{post_index}":
-    $ref: 'read/topic/topic_id/slug/post_index.yaml'
+    $ref: 'read/topic/topic_id.yaml'
   /api/recent:
     $ref: 'read/recent.yaml'
   "/api/recent/posts/{term}":

public/openapi/read/topic/topic_id.yaml

@@ -89,7 +89,7 @@ get:
                   tags:
                     type: array
                     items:
-                      $ref: ../../../../components/schemas/TagObject.yaml#/TagObject
+                      $ref: ../../components/schemas/TagObject.yaml#/TagObject
                   posts:
                     type: array
                     items:
@@ -277,7 +277,7 @@ get:
                           type: number
                           description: The flag identifier, if this particular post has been flagged before
                   category:
-                    $ref: ../../../../components/schemas/CategoryObject.yaml#/CategoryObject
+                    $ref: ../../components/schemas/CategoryObject.yaml#/CategoryObject
                   tagWhitelist:
                     type: array
                     items:
@@ -325,7 +325,7 @@ get:
                   related:
                     type: array
                     items:
-                      $ref: ../../../../components/schemas/TopicObject.yaml#/TopicObject
+                      $ref: ../../components/schemas/TopicObject.yaml#/TopicObject
                   unreplied:
                     type: boolean
                   icons:
@@ -402,7 +402,7 @@ get:
                   postIndex:
                     type: number
                   loggedInUser:
-                    $ref: ../../../../components/schemas/UserObject.yaml#/UserObject
-              - $ref: ../../../../components/schemas/Pagination.yaml#/Pagination
-              - $ref: ../../../../components/schemas/Breadcrumbs.yaml#/Breadcrumbs
-              - $ref: ../../../../components/schemas/CommonProps.yaml#/CommonProps
+                    $ref: ../../components/schemas/UserObject.yaml#/UserObject
+              - $ref: ../../components/schemas/Pagination.yaml#/Pagination
+              - $ref: ../../components/schemas/Breadcrumbs.yaml#/Breadcrumbs
+              - $ref: ../../components/schemas/CommonProps.yaml#/CommonProps