Add unit tests for SSL/TLS

- Add tests to connect to HTTPS hosts.
- Update companion app to allow testing secure server and certs.

Author: josesimoes

.gitignore

@@ -256,4 +256,4 @@ paket-files/
 .sonarlint
 
 # Auto-generated test configuration (produced from .runsettings at build time)
-Tests/SocketTests/TestConfiguration.cs
+Tests/**/TestConfiguration.cs

Tests/SslStreamTests_WiFi/SslClientTests.cs

@@ -35,7 +35,7 @@ public class SslClientTests
         public void Setup()
         {
             // Comment the next line to run these tests on real hardware with network connectivity
-            //Assert.SkipTest("Skipping SSL tests: requires real hardware with network connectivity");
+            Assert.SkipTest("Skipping SSL tests: requires real hardware with network connectivity");
 
             CancellationTokenSource cs = new(60000);
 

Tests/SslStreamTests_WiFi/SslServerTests.cs

@@ -44,7 +44,7 @@ public class SslServerTests
         public void Setup()
         {
             // Comment the next line to run these tests on real hardware with network connectivity
-            //Assert.SkipTest("Skipping SSL server tests: requires real hardware with companion running");
+            Assert.SkipTest("Skipping SSL server tests: requires real hardware with companion running");
 
             CancellationTokenSource cs = new(60000);