Don't hide slave information because of poor language skills

Add a parameter to canTalk to indicate whether particularly bad language skills should count as "unable to talk" or not.

Don't omit accent descriptions or speech rule settings from information just because the slave has poor language skills.

Also, when using report images, include the Head Girl's Slave's image with her report. I was going to make this a separate MR but Gitlab doesn't seem to be able to split MRs without loads of unnecessary branching, so it all comes at once...cherry-pick if you like, I guess.