Update SmartBlock Command <%QUERYBUILDER%>

[mdroidian]

Add additional examples, eg:

<%QUERYBUILDER:myQuery,The Result is {text} - {description}%>
<%QUERYBUILDER:myQueryBlock,Random Block from {text}: <%RANDOMBLOCKFROM:{uid}%>%>

Add undocumented features:

• block reference as arg
  • https://www.loom.com/share/d0492dfdbe5f4e89a4b996fe85c7317b
• columnName-uid to get uid of selection

Reference: RoamJS/smartblocks#120