Detect bibliography commands for csquotes package

[tarsobcaldas]

Csquotes has some very useful commands for quoting and citing, and the commands \textcquote \blockcquote (among others) all accept bib entries as keys, like

\textcquote[⟨prenote⟩][⟨postnote⟩]{⟨key⟩}[⟨punct⟩]{⟨text⟩}⟨tpunct⟩

or

\begin{displaycquote}[⟨prenote⟩][⟨postnote⟩]{⟨key⟩}[⟨punct⟩]
\end{displaycquote}

It'd be great if the keys could be autocompleted with the entries, like with the cite commands. The list of commands that use bib keys are included at sections 5 and 6.2 of the documentation.