refactor(scripting): extract script-callable types into Roslyn-free Core.Scripting.Abstractions (A0)

src/Core/ZB.MOM.WW.OtOpcUa.Core.Scripting.Abstractions/ScriptGlobals.cs

@@ -0,0 +1,20 @@
+namespace ZB.MOM.WW.OtOpcUa.Core.Scripting;
+
+/// <summary>
+///     Wraps a <see cref="ScriptContext"/> as a named field so user scripts see
+///     <c>ctx.GetTag(...)</c> instead of the bare <c>GetTag(...)</c> that Roslyn's
+///     globalsType convention would produce. Keeps the script ergonomics operators
+///     author against consistent with the dependency extractor (which looks for the
+///     <c>ctx.</c> prefix) and with the Admin UI hand-written type stub.
+/// </summary>
+/// <remarks>
+///     Generic on <typeparamref name="TContext"/> so alarm predicates can use a richer
+///     context (e.g. with an <c>Alarm</c> property carrying the owning condition's
+///     metadata) without affecting virtual-tag contexts.
+/// </remarks>
+public class ScriptGlobals<TContext>
+    where TContext : ScriptContext
+{
+    /// <summary>Gets or sets the script context available to scripts.</summary>
+    public TContext ctx { get; set; } = default!;
+}