Fix roll regex, update a bunch of others

[lunakv]

The regex for file rolling wasn't anchored to the beginning of the query, so searches such as !search o:"roll a d20" were triggering the roll command instead of the search command. That has been fixed.

While I was there, I also did some cleanup to the other regexps that we use:

• singleQuotedWord was rewritten to only use matching quotes
• Unnecessary non-capturing groups (and capturing groups which weren't used) were removed
• Single character alternate groups (a|b|c) were replaced with [abc]
• Some unnecessary escape characters were removed
• A space was inserted after the roll command so that !rolld20 is not valid (since that's just weird)
• Negations of groups which have explicit negated counterparts were replaced (\S instead of [^\s])

I also removed the logic that special-cased Uro as a foreign card. Firstly because I wasn't actually able to replicate the issue (!uro just returns Uro even when that thing is removed), and secondly because even if it does appear again, we can fix it just by adding "uro" into the short names dictionary.