Replace (most of) Microsoft.Teams.Cards code with auto-generated code

[dclaux]

Overview

This PR replaces most of the code in the Microsoft.Teams.Cards namespace with auto-generated code. This is follow-up work to this PR for TypeScript. The code is generated by this tool.

The auto-generated code presents the following differences compared to the code it replaces:

• Some type names are different
• For now at least the entire auto-generated code lives in one single file. We can always look into splitting it into multiple files in the future.
• All numbers are typed as float
• Minimal manually written code remains to introduce nice-to-have classes for Teams-specific Action.Submit data.
• The generated code relies on the StringEnum and IUnion types from Microsoft.Teams.Common

Note

Because of the nature of C#, some aspects are not 100% accurate such as Column.width which in TypeScript is typed as

type ColumnWidth = "auto" | "streatch" | number | RegEx;

Unfortunately there is no way to represent the RegEx in C#, so the type is hoisted into IUnion<string, float>.

Updating Microsoft.Teams.Cards going forward

• Navigate to the tool (permanent link coming). The content on that page is dynamically generate every time the page is visited. It 100% matches what is documented, guarantying accuracy and completeness.
• De-select target apps other than Teams
• Copy the entire generated code
• Replace the entirety of the Microsoft.Teams.Card/Core.cs file with that copied content
• The tool cannot currently be automated - there's no CLI available for it.