Changes to Get board by slug

for the path request parameter boardSlug, the minLength was decreased from 3 to 1

the response's body became nullable

the response's body type changed from no type to object for status 200

for the path request parameter boardSlug, the maxLength was increased from 24 to 60

added the required property allLists to the response with the 200 status

added the required property labels to the response with the 200 status

added the required property lists to the response with the 200 status

added the required property name to the response with the 200 status

added the required property publicId to the response with the 200 status

added the required property slug to the response with the 200 status

added the required property visibility to the response with the 200 status

added the required property workspace to the response with the 200 status

endpoint added