Support Common Magic Functions

[EagleoutIce]

Things like

• last_plot()
• options() (Support for calls like options #124)
• sys.frame()
• with()
• trace() / untrace()
• sink()
• Recognize on.exit() as a side effect #931
• Recognize set.seed() as a side effect #930
• Recognize sedwd() as a side effect #932
• ggsave()
• library() and friends (Handle 'character.only' in 'library' #198)

Please append whatever you want to have supported!

[EagleoutIce]

Is there anything of interest/what you potentially require @Ellpeck, @LukasPietzschmann, @SunVal?