Created Common things you may want to do (markdown)

Common-things-you-may-want-to-do.md

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+This is a page for things you may want to do, but are too confused by our documentation for.
+
+This page will show you specific applications of Ciphey.
+
+
+# Common flags you may want to use
+## How do I enable nested encryption?
+```
+-p ausearch.enable_nested=True
+```
+## How do I use Regex?
+```
+-C regex -p regex.regex={
+```