crunch: add page (#4719)

pages/common/crunch.md

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+# crunch
+
+> Wordlist generator.
+> More information: <https://sourceforge.net/projects/crunch-wordlist/>.
+
+- Output a list of words of length 1 to 3 with only lowercase characters:
+
+`crunch {{1}} {{3}}`
+
+- Output a list of hexadecimal words of length 8:
+
+`crunch {{8}} {{8}} {{0123456789abcdef}}`
+
+- Output a list of all permutations of abc (lengths are not processed):
+
+`crunch {{1}} {{1}} -p {{abc}}`
+
+- Output a list of all permutations of the given strings (lengths are not processed):
+
+`crunch {{1}} {{1}} -p {{abc}} {{def}} {{ghi}}`
+
+- Output a list of words generated according to the given pattern and a maximum number of duplicate letters:
+
+`crunch {{5}} {{5}} {{abcde123}} -t {{@@@12}} -d 2@`
+
+- Write a list of words in chunk files of a given size, starting with the given string:
+
+`crunch {{3}} {{5}} -o {{START}} -b {{10kb}} -s {{abc}}`
+
+- Write a list of words stopping with the given string and inverting the wordlist:
+
+`crunch {{1}} {{5}} -o {{START}} -e {{abcde}} -i`
+
+- Write a list of words in compressed chunk files with a specified number of words:
+
+`crunch {{1}} {{5}} -o {{START}} -c {{1000}} -z {{gzip|bzip2|lzma|7z}}`