phone-number.wat entry template is empty

[atk]

We should at least provide a function signature, e.g.

(module
  (memory (export "mem") 1)

  ;;
  ;; Returns a cleaned valid phone number or an empty string if invalid
  ;;
  ;; @param {i32} offset - The offset of the phone number in linear memory.
  ;; @param {i32} length - The length of the phone number in linear memory.
  ;;
  ;; @returns {(i32,i32)} - Offset and length of cleaned phone number or empty string
  ;;                        in linear memory.
  ;;
  (func (export "clean") (param $offset i32) (param $length i32) (result i32 i32)

  )
)

[github-actions]

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