Add FizzBuzz.md file

FizzBuzz/FizzBuzz.md

+𝗙𝗶𝘇𝘇𝗕𝘂𝘇𝘇 ⭐
+
+Create a script that print each number from 1 to 100. However, you must change the output for some numbers, depending on their value. 
+- Multiple of 3 should be replaced with Fizz,
+- Multiple of 5 should be replaced with Buzz,
+- Multiple of 3 and 5 should be replaced with FizzBuzz.
+
+Follow-up: 
+1.⭐⭐: Make it works with two given integer, the first as the start, and the second as the end. You must start printing from the first given value, not the lowest.
+
+2.⭐⭐⭐: 2⭐is required. 
+Now, in addition to Fizz, Buzz, and FizzBuzz, print Flash for numbers multiple of 3 and multiple of 7, Light for multiple of 4 but not multiple of 10, BALROG! when the number is a multiple of 666, and Narciss when the number is pluperfect digit invariant. 
+- Flash cannot coexist with Fizz, 
+- Light must be placed after Flash or Fizz but before Buzz. 
+- BALROG! and Narciss are special cases replacing any other case. Tips: What is a pluperfect digit invariant? 🎶 Search engine 🎶