Update editor API docs and examples

Hi

I realise that things have been moving quickly since the .Net 6 release, but it seems that many of the example bots and indicators in Automate need updating. If I try and launch them In Visual Studio with .Net 6 I often get an incompatibility warning, and they show as No Code Available in the CTrader client. The ones that do load often include depreciated code.

Also, the docs in the client editor are out of sync with the online docs. This led me astray till I realised. Take this example, which is still using MarketSeries rather than Bars.

Any plans to tidy this up? Working examples would be particularly helpful.