nms: add page (#5483)

pages/common/nms.md

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+# nms
+
+> Command line tool that recreates the famous data decryption effect seen in the 1992 movie Sneakers from stdin.
+> More information: <https://github.com/bartobri/no-more-secrets>.
+
+- Decrypt text after a keystroke:
+
+`echo "{{Hello, World!}}" | nms`
+
+- Decrypt output immediately, without waiting for a keystroke:
+
+`{{ls -la}} | nms -a`
+
+- Decrypt the content of a file, with a custom output color:
+
+`cat {{path/to/file}} | nms -a -f {{blue|white|yellow|black|magenta|green|red}}`
+
+- Clear the screen before decrypting:
+
+`{{command}} | nms -a -c`