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/IProgram.cs

@@ -0,0 +1,15 @@
+// I license this project under the GPL 3.0 license.
+// See the LICENSE file in the project root for more information.
+namespace Tomas.Interface
+{
+    public interface IProgram
+    {
+        /// <summary>
+        /// The program's main entry point. Boolean behaves as an exit point.
+        /// True and False are the equivalent to C's 0 and 1, i.e. "Success" and "Failure," respectfully.
+        /// </summary>
+        /// <param name="shell">Allows the program to interact with the shell.</param>
+        /// <returns>Exit back to shell.</returns>
+        bool Run(IShell shell);
+    }
+}

src/Tomas.Interface/IShell.cs

@@ -1,9 +1,14 @@
 // 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
+
+using System.Collections.Generic;
+
+namespace Tomas.Interface
 {
     public interface IShell
     {
         string ReadLine { get; }
+
+        Dictionary<string, IProgram> Programs { get; }
     }
 }

src/Tomas.Interface/Shell/IProgram.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 IProgram
-    {
-        bool Start();
-    }
-}