* v8 Updates for First MVC series
* Moving debug_menu50.png back to proper directory
* Fixing cross repo link for Migrations with Multiple Providers
* Updated scaffolding -sqlite flag to --databaseProvider sqlite
* Added completed 8.0 code and derived doc code sample with region snippets
* Updated all code links in all topics to 8.0 sample
* Corrected EF Migrations link to relative in add-model.md
* Corrected add scaffolding png on adding-model.md
* Fixed html source highlight
* Apply Tom's suggestion from code review: code style ticks on package listing
Co-authored-by: Tom Dykstra <tdykstra@microsoft.com>
* Applying Tom's review suggestion to version 7 adding-model as well
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Co-authored-by: Tom Dykstra <tdykstra@microsoft.com>