Change input filename structure

.gitignore

 # Pyre type checker
 .pyre/
 
+# Virtual environment
+pyvenv.cfg
+bin/activate
+bin/activate.csh
+bin/activate.fish
+bin/Activate.ps1
+bin/pip
+bin/pip3
+bin/pip3.10
+bin/python
+bin/python3
+bin/python3.10
+lib64
+
+# Advent of Code
+*.input

day01-1.py

 def main():
     from string import digits
 
-    with open("input01.txt", "r") as file:
+    with open("day01.input", "r") as file:
         input_lines = file.readlines()
 
     # The calibration value of each line is the first and last digit 

day01-2.py

 
     DIGITS_SPELLED = ["zero", "one", "two", "three", "four", "five", "six", "seven", "eight", "nine"]
 
-    with open("input01.txt", "r") as file:
+    with open("day01.input", "r") as file:
         input_lines = file.readlines()
 
     # The calibration value of each line is the first and last digit