Rename Project Euler directories and other dependent changes (#3300)

* Rename all Project Euler directories:

Reason:
The change was done to maintain consistency throughout the directory
and to keep all directories in sorted order.

Due to the above change, some config files had to be modified:
'problem_22` -> `problem_022`

* Update scripts to pad zeroes in PE directories

project_euler/problem_034/__init__.py

@@ -0,0 +1 @@
+#

project_euler/problem_034/sol1.py

@@ -0,0 +1,36 @@
+"""
+Problem 34: https://projecteuler.net/problem=34
+
+145 is a curious number, as 1! + 4! + 5! = 1 + 24 + 120 = 145.
+Find the sum of all numbers which are equal to the sum of the factorial of their digits.
+Note: As 1! = 1 and 2! = 2 are not sums they are not included.
+"""
+
+from math import factorial
+
+
+def sum_of_digit_factorial(n: int) -> int:
+    """
+    Returns the sum of the digits in n
+    >>> sum_of_digit_factorial(15)
+    121
+    >>> sum_of_digit_factorial(0)
+    1
+    """
+    return sum(factorial(int(char)) for char in str(n))
+
+
+def solution() -> int:
+    """
+    Returns the sum of all numbers whose
+    sum of the factorials of all digits
+    add up to the number itself.
+    >>> solution()
+    40730
+    """
+    limit = 7 * factorial(9) + 1
+    return sum(i for i in range(3, limit) if sum_of_digit_factorial(i) == i)
+
+
+if __name__ == "__main__":
+    print(f"{solution()} = ")