dcode: add page (#5747)

pages/common/dcode.md

@@ -0,0 +1,21 @@
+# dcode
+
+> Recursively detect and decode strings, supporting hex, decimal, binary, base64, URL, FromChar encodings, Caesar ciphers, and MD5, SHA1, and SHA2 hashes.
+> Warning: uses 3rd-party web services for MD5, SHA1 and SHA2 hash lookups. For sensitive data, use `-s` to avoid these services.
+> More information: <https://github.com/s0md3v/Decodify>.
+
+- Recursively detect and decode a string:
+
+`dcode "{{NjM3YTQyNzQ1YTQ0NGUzMg==}}"`
+
+- Rotate a string by the specified offset:
+
+`dcode -rot {{11}} "{{spwwz hzcwo}}"`
+
+- Rotate a string by all 26 possible offsets:
+
+`dcode -rot {{all}} "{{bpgkta xh qtiitg iwpc sr}}"`
+
+- Reverse a string:
+
+`dcode -rev "{{hello world}}"`