Add PenumbraAPI & GlamourerAPI + Update API & Connector

Glamourer.Api/Api/IGlamourerApiBase.cs

@@ -0,0 +1,11 @@
+namespace Glamourer.Api.Api;
+
+/// <summary> Basic API functions. </summary>
+public interface IGlamourerApiBase
+{
+    /// <summary>
+    /// Get the current API version of the Glamourer available in this installation.
+    /// Major version changes indicate incompatibilities, minor version changes are backward-compatible additions.
+    /// </summary>
+    public (int Major, int Minor) ApiVersion { get; }
+}