Correct swagger annotations for enums, status codes, and notification state (#37030)

## ⚠️ BREAKING ⚠️

- delete reaction endpoints is changed to return 204 No Content rather
than 200 with no content.

## Summary

Add swagger:enum annotations and migrate all enum comments from the
deprecated comma-separated format to JSON arrays. Introduce
NotifySubjectStateType with open/closed/merged values. Fix delete
reaction endpoints to return 204 instead of 200.

modules/structs/org.go

@@ -60,7 +60,7 @@ type CreateOrgOption struct {
 	// The location of the organization
 	Location string `json:"location" binding:"MaxSize(50)"`
 	// possible values are `public` (default), `limited` or `private`
-	// enum: public,limited,private
+	// enum: ["public","limited","private"]
 	Visibility string `json:"visibility" binding:"In(,public,limited,private)"`
 	// Whether repository administrators can change team access
 	RepoAdminChangeTeamAccess bool `json:"repo_admin_change_team_access"`
@@ -79,7 +79,7 @@ type EditOrgOption struct {
 	// The location of the organization
 	Location *string `json:"location" binding:"MaxSize(50)"`
 	// possible values are `public`, `limited` or `private`
-	// enum: public,limited,private
+	// enum: ["public","limited","private"]
 	Visibility *string `json:"visibility" binding:"In(,public,limited,private)"`
 	// Whether repository administrators can change team access
 	RepoAdminChangeTeamAccess *bool `json:"repo_admin_change_team_access"`