add run task action to terminal dropdown

[meganrogge]

Could look like this, but have pinned and/or recently used tasks entries as well as a Configure Tasks one.

Hiding it by default is a good way to avoid cluttering the action bar - so people only see it if they want to

[meganrogge]

cc @Tyriar

[meganrogge]

Talked w Kai and we're thinking to instead add a Run Task action to the terminal dropdown which aligns with the Terminal menu and will aid in discoverability