✨ Add "is-prime-number" challenge

challenges/is-prime-number/solutions/python-prime/README.md

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+# python-prime - is-prime-number
+
+Programming language : Python
+Created by [@Divlo](https://github.com/Divlo) at 5 July 2020.

challenges/is-prime-number/solutions/python-prime/solution.py

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+# Only the non-zero and positive divisors
+def divider_list(number):
+    number_list = []
+    for index in range(1, number + 1):
+        if number % index == 0:
+            number_list.append(index)
+    return number_list
+
+def solution(number):
+    return len(divider_list(number)) == 2