Start() in IProgram has been renamed to Run()

- Run() loop in the shell is now wrapped in a try-catch statement.
- Added Github CI
- Removed OSConsts and TermConsts
- Programs can now access the programs dictionary directly from the shell

src/Tomas.Interface/Shell/IShell.cs

@@ -1,9 +0,0 @@
-// I license this project under the GPL 3.0 license.
-// See the LICENSE file in the project root for more information.
-namespace Tomas.Interface.Shell
-{
-    public interface IShell
-    {
-        string ReadLine { get; }
-    }
-}