DOC: Enforce Numpy Docstring Validation for pandas.Interval.mid (#58572)

* DOC: add SA01 for pandas.Interval.mid

* DOC: remove SA01 for pandas.Interval.mid

Author: tuhinsharma121

ci/code_checks.sh

@@ -89,7 +89,6 @@ if [[ -z "$CHECK" || "$CHECK" == "docstrings" ]]; then
         -i "pandas.Interval PR02" \
         -i "pandas.Interval.closed SA01" \
         -i "pandas.Interval.left SA01" \
-        -i "pandas.Interval.mid SA01" \
         -i "pandas.Interval.right SA01" \
         -i "pandas.IntervalIndex.closed SA01" \
         -i "pandas.IntervalIndex.contains RT03" \

pandas/_libs/interval.pyx

@@ -167,6 +167,12 @@ cdef class IntervalMixin:
         """
         Return the midpoint of the Interval.
 
+        See Also
+        --------
+        Interval.left : Return the left bound for the interval.
+        Interval.right : Return the right bound for the interval.
+        Interval.length : Return the length of the interval.
+
         Examples
         --------
         >>> iv = pd.Interval(0, 5)