Create "EF Core Power Tools"

[ErikEJ]

Why:

• Avoid making VS SQLite Toolbox depend on .NET 4.6.1 (.NET Standard 2.0)

• More focus on EF Core than the specific databases

• Initial support for SQLCE 4, SQL Server/Azure SQL and SQLite

• Open up for additional features beyond Rev Eng

• For VS 2017 only

• [x] Icon

• [x] Link to relevant wiki page from extension manifest

• [x] Update of root readme.md

• [x] Ensure publish to vsixgallery

• [x] Add content to dedicated wiki page

• [x] Preview image (in package)

[ErikEJ]

List DDEX connections: https://github.com/ErikEJ/SqlCeToolbox/blob/master/src/GUI/SqlCe35Toolbox/Helpers/DataConnectionHelper.cs#L34

Prompt for and save new DDEX connection: https://github.com/ErikEJ/SqlCeToolbox/blob/master/src/GUI/SqlCe35Toolbox/Commands/DatabasesMenuCommandsHandler.cs#L82

Add DDEX registrations to package: https://github.com/ErikEJ/SqlCeToolbox/blob/master/src/GUI/SqlCe35Toolbox/SqlCeToolboxPackage.cs#L17

Add project Context menu: https://github.com/aspnet/EntityFramework6/commit/49be302abe33167141b18c7c2c18b9c5abaec626

[julielerman]

The only feature I use but am DYING without it for EF Core is the model visualization. At this point I don't care if its not cross-platform. :)

[ErikEJ]

@julielerman Hi Julie, I have logged: https://github.com/ErikEJ/SqlCeToolbox/issues/462 - maybe you could add a couple of words about your "vision" for this, considering that EDMX is dead?